Is it possible to get at least a decent gaming computer for $900 or less? My computer is one of those mini-comps that is like a 1/3 of the size of an original computer and it LAGS so horribly on everything T.T so I'm trying to get something a little better. If there is a gaming computer for $900, what are the specs and all? and if there isn't, what specs are good for a computer that plays say. . . umm . . . Call of Duty 4 on low quality settings or something?