Is it the controller S that you have? It's turning out to be my fave controller ever (with the exception of the black and white buttons, which are just oddly placed
). The size and shape is absolutely perfect for my hands, and the buttons aren't oddly mishaped this time around.
But I agree with Dillon. Wait for the ps2 reviews, see if the port is solid (though it seems like it will be), and if it is, go with comfort, or load times (which is what I would do).
Edit : Don't think about the PC version. Though you can check out the demo, and see for yourself.