I'm surprised this thread hasn't picked up!
Here are my most recent purchases:
The complete string quartets of Beethoven by the Alban Berg Quartet (I've listened to the early quartets, and I like 1 and 6.)
The Glory of Rostropovich - it's basically 8 CD's of Rostropovich playing and conducting, from Baroque to 20th century, with a fairly large gap in the Classical. (
Site)
Vieuxtemps violin concertos 5, 6 and 7 - Misha Keylin (Naxos)