I don't know if I should really be bothering you with this, but I've just finished a song with a GPO string quartet and a French horn and trumpet.
It's called Phone Rage, and you can listen to it here http://www.soundclick.com/johnbranermusic.htm at the top of the list. The "ensemble" doesn't come in until 2:40, so you can fast forward if you're not into this type of music.
I just got a great plugin called "Vintage Warmer" and I ran the "ensemble" through it, and it fattened up the sound of the solo instruments very nicely. I also ran it through the SIR convolution reverb with the Concertgebouw impulse.
I know my "ensemble" is a little buried under the bass, drums, mangled guitar, and telephone robot - but I hope you like it
Any feedback appreciated....