Which gaming desktop is better this or that?

[halo3678]

Some computers that I was considering purchasing
Price range:up to $1500
Don't suggest Ibuypower or cyberpowerpc
Must be able to run Crysis,MW2,Metro 2033, and starcraft 2 at ultra
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=6970829&CatId=114

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=6824555&CatId=114

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=6734158&CatId=4928

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=31135&CatId=4928