Some artists/tracks:

VAST
Shiny Toy Guns - Le Disko [Version 3.0]
Death Cab For Cutie
The Crystal Method
Goldfrapp

It's surprising, but Smashmouth has good production on their tracks that make it worth listening to on a good setup.

I also like Alessandro Safina, he's pop/opera, and more traditional voices like Andrea Bocelli.
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Mark Cushman