Best full orchestra recordings?


In my travels to hi-fi shops I've listened to some recordings of full orchestra works, but my music collection suffers from a conspicuous absence of such recordings. I have what looks like a "greatest hits" kind of collection in this area (Copeland, Stravinsky. etc.). Since putting together a high-end system I am much more appreciative of these types of recordings. I know there's a wealth of information out there: any recommendations of orchestral works, new or old, that should be in one's collection?
128x128mdrummer01
Which recording of the Symphonic Dances? Everyone seems to tout the Johanos/Nonesuch(or Classic or MF) but I prefer Ashkenazy/Decca or the Previn/EMI. The latter is a little too full in the midbass but otherwise big and spacious.
Kr4, I agree. IMHO, Ashkenazy/Decca by a considerable margin. It comes with a very good Isle of the Dead as well.

In fact, I prefer his Symphonies as well. They are just more taut than Previn's, and most others except Pletnev, which suits me fine. His PC's w/ Previn are also excellent as are their Suites for 2 pianos. Even Ashkenazy's solo piano works are excellent. Ashkenazy rules Rachmaninoff! or at least almost rules. :-)
Yes, Ashkenazy is more taut but there's something about Previn's Symphony #1 and the Dances that is lacking in Ashkenazy's otherwise superb recordings.

Kal