With no DRM and good bitrates, the Amazonmp3 Store is a great place to check out some new tunes. You can sample the songs and automatically import them to your preferred software.
Here's my recommendations for some amazing deals:
Wolf Parade At Mount Zoomer $5.99
Fleet Foxes Sun Giant EP $4.99
Red Sparowes Aphorisms $2.97
Queen A Night at the Opera $3.99
Hank Williams 20 . . . Greatest Hits $1.99
David Bowie The Rise and Fall of Ziggy Stardust and the Spiders from Mars $5.00
There's lots of other deals, too; just use the handy search-by-price links on the left.