I would go with Newegg, Directron and Gogglegear as mentioned. However, you will deffinatly pay MORE than you have to at COMPUSA. They do not price fairly at all and it would be a waste of money. Here are some examples. I live in AZ and have seen these prces face first. When I asked the sales person why they were ripping people off with these prices, he told me this is the market acceepted price and if we find it online for less it might be a stolen shipment or a one time offer. ??? Stolen shipment???
Example, BAWLS per case.
Case of Bawls = 24 10oz Bottles. All locations sell for $20-$24
CompUSA Case of Bawls = 12 10oz bottles for $17
Here in AZ not online.
Example 2 AMD Athlon XP 2400+ 2.0GHz CPU RETAIL
2400+ at Googlegear = $154.00
2400+ at CompUSA = $299.99!!!!! WHATEVER!!!!
http://www.compusa.com/buildyourown/product_info.asp?product_code=299636&pfp=BUILDYOUROWN AND in AZ!!!
Example 2 PNY VERTO 128MB Ti4600 GFX card.
PNY VERTO 128MB Ti4600 at Googlegear = 241.00
PNY VERTO 128MB Ti4600 at CompUSA = $325.00
Here again in AZ not online
Don't waste your money at CompUSA. You will always pay more than you have too. Same goes for Fry's Electronics. They charge a little less than CompUSA but approx. 80-90% of all returns endup back on the shelf with a white sticker stating a return, however the items are NOT TESTED PRIOR TO RESTOCKING!!!!! NEVER!!!!
They also like to sell motherboards for full price even though they are missing parts and peices (floppy connector, BIOS chip etc)
Stick with the 3 listed, and any others you find OK at
http://www.resellerratings.com
Finally to answer your PSU question, get the Antec TruePower. I have the 480Watt version and love it. Always accurate and stable. Plus I like the blue light inside! LOL!