Well if I was going to get it, then the PS3 version would be a no brainer even if I wanted it on PC.
So...does the PS3 version come with a CDKey then? Sure you have to link your PSN account to your Steam account, but whats to stop me from borrowing or renting the PS3 version, linking the accounts, and just getting the PC version free?
Even if it has a code you could turn around and sell the PS3 copy and get quite a bit of your money back out of it.