I have bought a lot of stuff from Cd-Wow in the past couple of months and I have to say the service that I received was excellent.
All Cd's are £8.99 and Tapes £5.99 and postage is FREE and you usually receive the goods within a week of ordering.
The selection they have is the Top 75 albums and you can pre-order albums before they come out.
The CD's can be shipped from anywhere in the world as I received my one CD from Hong Kong and my other one from Germany (strange!!)
I ordered Kid A by Radiohead from Cd- Wow.co.uk. I opened it up to find a extra book inside compared to the Uk version. I am a huge Radiohead fan so it made it more worthwhile.
The website is said to be very secure with your credit card details etc and you don't receive much junk mail.

A excellent site for popular artists but the selection is limited to the Top75. The Customer Service is 10 out of 10 though