Cheregi writes, "That said, I think I strongly prefer performances that are faster and with fewer singers and instrumentalists - on the 'chamber music' end of things. Does anyone have good recommendations along these lines?"
Me too, generally, & for scholarly as well as aesthetic reasons (although I wouldn't want to be without conductor Peter Schreier's two wonderful Leipzig & Dresden accounts of the Mass played on modern instruments).
For one-voice-per-part or OVPP performances, I'd suggest that you look into the period recording by the Dunedin Consort, conducted by John Butt, which uses an edition of the score created by Joshua Rifkin (who made the very first OVPP recording on LP back in the early 1980s). Note that there are parts of the mass that call for a double choir--here at least 10 singers, 2 x 5, or a double quintet (versus the usual 8 singers in a double choir--2x4, or a double quartet), so the singing shouldn't sound too sparse in those sections. Nor, IMO, should the final Dona Nobis Pacem be taken briskly, as Bach intended the movement to be played with 'majesty' (which may be something to keep in mind when comparing recordings).
Another favorite of mine is the partly, but not entirely OVPP recording by Jos van Veldhoven and The Netherlands Bach Society on Channel Classics, in DSD hybrid SACD surround sound. Veldhoven mixes an OVPP choir with a fuller (yet not oversized) choir for "aesthetic" reasons, but tends to favor brisk tempi (if you like brisk tempi in Bach, you'll also want to check out his St. Matthew Passion). Here's a live performance to give you some idea about Veldhoven's approach to Bach:
. (Otherwise, I see the Channel Classics box set may be hard to find these days, as it appears to have gone OOP on Amazon... ??)
In addition, there are a number of other excellent OVPP versions that are worth looking into, which you may prefer, as tastes can vary: from (1) Konrad Junghanel & Cantus Colln (although unfortunately, Junghanel takes the final Dona Nobis Pacem too briskly--in my view, in an otherwise terrific reading), (2) Marc Minkowski & Les Musiciens du Louvre (in their very first Bach recording--imagine starting with the Mass in B minor!), and (3) the pioneering OVPP performance from Andrew Parrott & the Taverner Consort & Choir (which I expect you'll probably like, since it's a very reduced performance, like Butt, Parrott uses no more than 10 singers, with an authentic sized instrumental ensemble. Btw, you may also enjoy reading Parrott's book on the subject of Bach's choir:
https://www.amazon.com/Essential-Bach-Choir-Andrew-Parrott/dp/0851157866). While others have liked Sigiswald Kuijken and La Petite Bande's recording, released in 2009 (& reissued in 2015) a bit more than me I'd say ... So you might want to check out and compare these recordings via listening samples (on You Tube, Spotify, etc.) & read reviews.
Konrad Junghanel, Cantus Colln:
Andrew Parrott, Taverner Consort & hoir:
With that said, I've not heard the recent OVPP version from Lars Ulrik Mortensen and Concerto Copenhagen, but it has received good, if maybe slightly mixed reviews in some quarters, and it also comes on two hybrid SACDs.
The conductor that I'd consider to be the finest OVPP Bach conductor in the world today is Eric Milnes, who records with Montreal Baroque on the Atma label. Milnes initiated, at the time, the first OVPP cycle of Bach Cantatas, and has been progressing slowly but surely through this cycle over the past decade or so, taking his time to produce thoroughly well rehearsed performances, where he has consistently chosen exceptional solo singers: One essential & quite necessary attribute in a OVPP performance, considering that the singers are more exposed in these performances. Milnes' tempi are also consistently apt & well chosen, in my view. However, unfortunately, Milnes has yet to give us a Bach Mass in B minor. Hopefully, he will one day, and if so, I'll definitely be purchasing it. So, I'd suggest keeping an eye out for a possible Mass in B minor from him--which will be worth the wait, I expect, but in the meantime, I'd also recommend exploring his wonderful 'in progress' Bach Cantata series on Atma: For starters, you might check out their superb disc of Bach's very underrated St. Michaelmas Cantatas (which I liked so much that I bought an extra copy as back up, which is something I very rarely do):
https://www.amazon.com/Bach-Cantate...s+bach+cantatas&qid=1610128450&s=music&sr=1-6.
Another excellent OVPP Bach conductor & ensemble to watch out for in the future--for a possible Mass in B minor--is Philippe Pierlot and the Ricercar Consort. Pierlot & co. have made a very fine OVPP recording of Bach's Magnificat, for example, and will undoubtedly get to the 'great' Mass at some point:
You might also enjoy the Purcell Quartet's OVPP chamber recordings of Bach Cantatas (but again, they've not done the Mass in B minor):
.
(Btw, while I'm on the subject of the cantatas, there's another excellent OVPP Bach Cantata disc from Konrad Junghanel & Cantus Colln, performing the "Actus Tragicus" Cantata BWV 106, etc.:
. Plus, there's also Joshua Rifkin's pioneering OVPP Bach Cantata recordings on L'Oiseau-Lyre, which are well worth hearing.)
While in the 'other camp', you'll probably want to stay away from conductors Gardiner, Herreweghe, Leonhardt, Hengelbrock, and Koopman, who all use oversized choirs (usually well over 16 singers, which was the limit during Bach's lifetime, in Lutheran Germany) & larger instrumental forces than Bach asks for, whatever the merits of their performances may be otherwise. Of these five, Gardiner tends to get away with a huge choir, more so than the others, due to the incredible virtuosity of his Monteverdi Choir. So too does Hengelbrock, with his fine Balthasar-Neumann-Choir (& excellent Freiburger Barockorchester). In contrast, Suzuki tends to use smaller, more medium sized forces than these conductors (16 singers or less), but his performances aren't one-voice-to-a-part, either.
As for Vaclav Luks and Collegium 1704, Luks uses a choir of 21 singers, which is a gigantic choir for Bach's time, and therefore, far from an authentic 'chamber' version. Although it is a beautiful and thoughtful performance.
Hope that helps.