What's important in a gaming computer?

I am looking to buy a new gaming computer for the Windows 7 transition and need opinions from more experienced buyers. First: I need Recommendations; must haves; popular choices. Second: Rating of a computer I found on eBay: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=370236500448&refid=store Is... show more I am looking to buy a new gaming computer for the Windows 7 transition and need opinions from more experienced buyers.

First: I need Recommendations; must haves; popular choices.

Second: Rating of a computer I found on eBay:

http://cgi.ebay.com/ws/eBayISAPI.dll?Vie...

Is it a good starter's kit? I plan on getting a better video card later; as well as, when it releases: Windows 7.

Also, can this computer play Crysis?
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