Well you need to give more information than just "classical". Name some good composers and orchestras of the like!

I think you should defenately consider looking into a lot of Australian blues/roots kind of bands. Xavier Rudd has a pretty good sound, he plays all his instruments at the one time too! (i.e. guitar/slide guitar, percussion, stomp box, digeridoo).

Mick Hart is pretty good if you like Jeff Buckley, 'Still the Flowers Bloom' is a brilliant song. Absolutely brilliant.

And there's stuff like John Butler Trio (which you might have heard if you live in the UK), Carus, The Beautiful Girls, Alex Lloyd (start off with 'Black the Sun').

Oh yes, defenately get some of Augie March's stuff! Awesome stuff.