Best recording labels for orchestral music


I am in the process of building my music library. Some of my favorite composers are Holst, Copland, Gershwin, and Ravel to name a few. The problem is I'm not sure which recording label to go with on these and other artists. For example I have a recording of Holst's Planets performed by the Los Angeles Philharmonic Orchestra and conducted by John Williams. The recoding label is Decca. This has got to be one of the best recordings I've heard of this piece of music.
My question is this: Are there specific recording labels to stay away from and which in your opinion are the better ones to look at?

Thanks.
128x128foehn
Actually, one of the most tragic, soul-gripping music in the world of classical music is that of Shostakovich. He barley survived a cruel dictatorship, which killed aout one-fourth of the population of its own country. His music is really about the sufferings and about the fear of human beings. He belongs to the very small group of composers, who devoted his music to the tragedies of his own time.
record labels to consider:

klavier
harmonia mundi
glossa

you will hear excellent sound and good performances.
My favorite classical labels are:
Hyperion
Chandos
Glossa
Alia Vox
But there are many, many more with fine sound and performances.
Mrtennis, just a thought. I've found some of my Glossas to be on the bright side. One of Guerrero motets is the most noticeable. In your opinion, do Glossas seem to be balanced a bit brighter than the Klaviers and Harmonia Mundis, or is there no difference you can hear?

For the OP: among my own label preferences are ASV and sometimes Bis. Two Norwegian labels are also excellent: Simax and 2L.
I have a bunch of old Lyrita CDs that sound very nice. I see that this label has recently been resurrected.
Also have some old Unicorn Kanchana CDs, don't know if they're still around.
I agree with you Tobias, many nice things on ASV and Bis.