Pc build?

[carnage]

As usual AMD stuff tends to cost less, but if single-core performance is what you really care about, I'd say the i7 is the best choice you can do.

But, if you're going to use it primarly as a studio PC, then the eight-core(!?!?#@) AMD Bulldozer is more than enough for your needs and you'll supposedly be able to run any game at max graphics quality with absolutely no problems, given that the rest of the components are similar in performance. And you seem to have a clearer idea regarding the motherboard (I feel the same way about intel mobos, btw), so I'd say go for the AMD CPU+mobo.