Classical music recordings upgrade


I have Beethoven's 9 symphonies by CSO with Solti at the helm on London recordings. Great performance, dreadful analog to digial transfer. Need suggestions for better recordings of this material. CSO is my favorite, but will listen to other orchestras. Thanks.
celtic66
The London LP box set is fairly common, just make sure you get british pressings. The sound is very good.
For complete sets:

Barenboim, Berlin Staatskapelle on Teldec, the 1963 Karjan cycle on DG, the Bohm cycle on DG, and the Wand set on RCA are my favorites.
For sets,don't overlook Leonard Bernstein - his Beethoven is surprisingly good! I also second the recommendation of Harnoncourt and Wand for 3 divergent views of how Beethoven can be performed.
I concur with Barenboim's set on Teldec with the Staatskapelle. Absolutely amazing from 1-9 interpretively and sonically. The orchestra sounds great to boot.
Celtic66, can you play vinyl? If so, the Solti/CSO performance has been reissued on vinyl by Speakers Corner in beautiful analog sound.