MAXED Witcher 2 @ 1080p I wouldn't say... though I could be wrong... and I also could be an idiot that sucks at reading comprehension!
As far as Starcraft II goes, My old Pentium 4 w/Radeon 4650HD manages to max that out and still run @ 30FPS... and no, I am not kidding. Though my main PC is an i7 based laptop.
The only thing I would change in that build is that I'd swap your GPU for the AMD 6950 HD... the price is almost identical and it's somewhat more powerful. The ones I saw benchmarked run a little hotter than the GTX 560 ti, but they do run a bit faster. Myself, I recommend the Sapphire one. The cooling is well done on it.
If you're planning to overclock your GPU though, I'd stay with the 560. It runs cooler and OC's better, too.








