This web site has a decent selection for music, many multi channel selections are there too. The bargain right now is that on top of their "fair" pricing you can get $10 off a shopping cart of $20 by using the code gbuy10
Wish I knew about this before placing my Amazon order of Friday...guess now I'll have to order some more!
Edit: This may be expired as I just tried it and the google check out option that is required was not on the screen....sorry!