Looking for instrumental & classical covers of alt rock...

So, I decided to look around for covers of some decent bands I've been listening too (311, Incubus, etc.), and I came across the Tallywood String Quartet. Great group and all, but I'm yearning for a more robust full instrumental setup for a number of bands. Can anyone suggest who I should look for in those regards. Tallywood is great and all, and very impressive with what they can do with strings (replace drums anyone?), but I'm looking for a group that incorporates other groups of instrumentation. Piano, drums, more acoustics, etc. Enough to have a sound all their own.

Thanks in advance.