Hey guys: Done a ton of research on cards and I'm pretty sure I want a 750 TI since I wanted something that was bus powered, efficient and didn't generate a ton of heat. For those of you who have done the upgrade already, is there a recommended model to get? I wanted to make sure I was staying as compatible as possible, especially for things like wake from sleep and whatnot. System is a Mac Pro 4,1 flashed to 5,1. Thanks for any help, it's really hard to get specific model recommendations!