I have a Mac Pro 4,1 Octocore System with an ATI Radeon HD 4870 & 16GB of RAM. I have some spending money and I kinda want to upgrade the GPU again. I use mainly FCP, After Effects, and Photoshop...no gaming. Is there currently any good GPU's that would give me a decent boost in terms of performance in programs like After Effects? I looked at the 5770 and 5870, both seem nice but I don't know if either are gonna really give me a decent leap in performance. Anybody in same situation as me and see increase with either one of these cards? I don't have enough to buy the quadro cards, way too expensive, but I can spend up to $450. Thanks for the help.