Hi - I'm currently sitting at the shopping cart on the xkeys site......but I'm not sure what xkeys pro I should buy - ps2 or usb? I box 5 accounts on one pc, I've read a lot of posts saying to get the ps2 but cannot find a reason why except for hardware boxers. Unfortunately searching xkeys on our forums returns 357 results - now I'm adding the 358th :) So the question is: why is ps2 > usb