Good build. I have nearly the exact same thing and it's fantastic. I also have a GTX570, 2500k, and C300 SSD. I only have the 64gig SSD though, so only have the OS and a few other apps on it. You have enough room for a couple games if you wanted. I keep all my apps on a 1TB F3 though and load times are still quick.
I will say this though, there are certain games that don't play well with overclocked GPUs (like Just Cause 2). I also have an overclocked 570 (from MSI) and I had to downclock back down to what stock normally is to run JC2 for more than an hour or so. It wasn't a temp issue, it was just unstable in that game. Other games ran fine.
It's a glorious machine though. I haven't had a gaming PC in a long time, and that was a socket 754 single core with an AGP x850xt. You should be plenty happy for a couple years still. I know I am.