(imo) best looking label sites:

http://www.advancedrecords.net/

http://www.intecrecords.com/ (very readable? site)

http://www.recycledloops.com/

http://www.still-music.com/recordcompany/index.html

and

http://www.unknownforces.co.uk/
http://www.audioassault.com/
(i love dark modern minimalistic art! so that's why i choosed some of this sites, for example 'advanced')