Once that do covers. Anyone?

It'd be nice to find some who does 'studio' covers (not just on webcam) so they're HQ, but not over-produced or autotuned to hell... I've seen quite a few 'good' ones but they're either recorded in an okay-ish quality, or just really overdone

The male singers in Pentatonix are so good.

www.youtube.com/watch?v=QkR4asPMip4

Sam Tsui

http://www.youtube.com/watch?v=uxTDK1S5qJ0

Also these guys are brilliant, Michael Henry and Justin Robinett

http://www.youtube.com/watch?v=OfPtl5saFtw

AJ Rafael is really good too

www.youtube.com/watch?v=VzkEw-FYc4k

Another vote for Sam Tsui
http://www.youtube.com/watch?v=a2RA0vsZXf8

Also good
Alex Goot

Mike Tompkins

Mark Ruebery