Just a warning... the PC version has quite a few issues. Many people experience crashing issues, frame rate issues (even on high end PCs), and it's got the speed-up issue that is also found in Saints Row 2 PC. As well as quite a few other problems.
With the speed-up issue, the game will basically runs about 1.5 times faster than it is supposed to. It seems to affect almost everyone on Windows 7, and a few people on other OSs.
I am on a pretty high end Windows 7 computer, and I experience all of the issues I mentioned. I regret getting the PC version of this game. Though, it's only $5, so you may be able to look past the problems.
They have promised a second patch, so hopefully it will fix a lot of the issues.