I always buy my stuff from Promax Computer Systems. They seem to have the best prices on most parts and I've never had any hassles with exchanging defective hardware. I've gotten four complete computer systems from them in the past year not too mention numerous parts, 2 HD, motherboard, CPU, bunch of RAM, CD Writers... etc. no problems what so ever. I think if you buy a lot of computer hardware it's more important to develope a good relationship with the shop then just buy from the place with the lowest price. Cause now when I go buy parts at Promax, they usually give me $5 or $10 dollars off without me even asking. It's not much but it shows they appreciate your business and want you back, and I can't say that about alot of shops I've been too.
-LeeBear