I would never purchase from pc infinity...
Resellerratings.com
Here is a comment, also from Resellerratings.com, about ibuypower -
"I have ordered from this company 3 times and until my order in January I have not had a problem. Then I ordered 6 copies of Corel 10 OEM and only received three, as well as one system had a dead modem. I called several times before I could understand anyone to speak with. I finally was told they knew that modem was bad and would send another type at no cost. They also said they would send the additional 3 copies of software- neither has ever arrived. They also told me they needed my CC# to validate for shipping. I called and gave my business card number. The same day it was used from LA California (close to where they are located) to call a scam phone number in China. The card had not been used three weeks before this order and I had not used it for anything else. Just chance? - I think not. I will NEVER go back. Be VERY cautious about giving out your CC# to anyone at the company. If you should decide to use them go through the web and keep a GOOD record of your spending on your CC#."
And here is the most recent comment about PCUSA -
"I am buying tons of equipment online and this was the worst expreience I've ever had.
PCUSA is using unfair practices in order to get customers.
The grand total of my purchase was $504 and they make me believe that shipping is free. Now once they've got my credit card number they generously billed $53 more.
I send them an email and the response I've got was extremely arrogant.
I can't believe this is happening. In these times of fierce competition I could choose better reseller.
I hope they go out of business soon with all other cheaters who undermine the Internet economy.
NO MORE PCUSA!"