Thought I'd share some experiences: I love www.qobuz.com, even though their website is in French. Google Translate does a wonderful job, though. Their 'studio master' recordings start at 44.1kHz/24bit and go up to 96kHz/24bit. Sweet, and very affordable: around €15 for a lossless album.
I wanted to buy something off beatport.com, but it appeared they add $1 per song (!) for lossless downloads. Sent an email to customer service and got this back:
Quote:
Lossless files have an additional charge for downloading due to bandwidth and server space allocated to download a large WAV file.
Crappy reason. I'll probably never (try to) buy anything there ever again.
Finally: not sure if it's already on the list, but www.djshop.de also offers lossless downloads at a good price. As the name suggests though, it's only dance/house/electro/... If that's what you like, they have a pretty decent catalog.