Great topic - Shostakovich symphonies are major components in the symphonic repertoire,and are receiving lots of live performances at present.
some favorites of mine - [I've heard many, many Shostakovich performances, and have performed his symphonies many times, as well]
Sym #7, and Sym #1 - Bernstein/Chicago Symphony/DG - perhaps the finest symphony recordings I've ever heard. Bernstein's #7 is cosmic, a great performance - the first mvt crescendo is terrifying, and the finale is indescribable - one of the great sound spectaculars of all time. Wonderful performance of Shostakovich's 1st symphony. a remarkable work that already shows the genius of its creator.
Sym #5 - I go for Bernstein/NYPO/1959. a classic performance, recorded in Boston Symphony Hall, after the orchestra had returned from its European/Russian tour. I've heard some/played some really fine versions, since then, but I'll still go back to LB/NYPO/59.
Sym #8 - really heavy-duty piece - dark, foreboding, this is not happy music!!
Solti/CSO is terrific. so is Mravinsky/LenPO - [9/60 BBC] - great recording - really gutsy.
Sym #9 - Best ever - Kurtz/NYPO - 1947 - in remarkably good sound - classic performance.....but may be hard to find...Kondrashin/MoscowPO is really good, so is Solti/Carnegie Hall Project Orch - hand-picked orchestra for Solti's special program....very good - terrific solo work,crucial in #9.
Sym #10 - great piece - the best recordings, IMO, may be hard to find -
Stokowski/CSO live concert 3/66 - nothing like it!! [CSO archival set "Chicago SO - First !00 Years"]
Mitropoulos/NYPO c. '54. wonderful - with superb solo work by NYPO.
These may be hard to locate -
Solti and Mravinsky have fine recordings of this major work.
Sym #11 - lots of choices -
Stokowski/HoustonSO is a long-time favorite.
Mravinsky/LenPO is a top candidate as well.
I've not yet heard them, but I would expect [from live performance experience] that some of the Nelsons/BostonSO recordings would be high recommendations, in very good up-to-date sound. Maybe not at the peak of the pyramid, but very fine accounts nonetheless. I plan to check them out....
Hope this helps....