The reason I didn't say Titan z was because while I think that the titans will excellent for gaming, they were more geared at professional apps, but I could be wrong. Either way, this build is going to cost well over $5000 when you factor in the nuclear reactor you're going to have to buy the power the thing, and some 22nd century cooling device needed to have it not slowly roast everything to death like Zanka no Tachi.
Edit: Wow over $12,000. Whoever builds this needs a good old fashioned passionate as whoopin.