It would be somewhat of a tough sell at $60, considering you can currently buy it for PC at $30, not that PC and console game pricing maintain any sort of parity.
I think it would move quite a few copies if bargain priced at $40.
Unfortunately, I already have this for the 360, and if I were to buy it again, (see above) only $30 on PC which will run at over 60fps at 1920x1080 on high settings on my rig.
The "enhanced" part of the PS3 version could almost make it worth the PC gamer's while though, depending on what it brings to the table.