I'm in the process of selling my MP 3,1. I upgraded the old 8800GT card with an ATI 5770 Mac edition. The guy interested in my rig says that eventually he'd like to get a 4K display but wasn't sure if down the road that meant getting a new video card. Is there any reason why the 5770 wouldn't be adequate to run a 32" 4K display at 60Hz whenever he gets one? I think his plan is to mainly use the machine for freelance video work.