Well the CPU is good, the Motherboard is okay, the rest... you could find better and cheaper. No gaming system is complete without a good VGA card and this build has none. I think that is a big hole in the spec. $20 for a mouse pad, really, but no VGA card? I'd pass on it.
I would assume that the reason there is no video card is that the builder would want to pick there own. I know people who swear by a specific $45 mouse pad.