My PS3 BR drive died and, seeing as Sony won't be seeing a single cent from me ever again, I'd like to upgrade the NVIDIA GeForce 7300 GT 256 MB in my 2007 Mac Pro. I'm running Lion but I've not looked into PC GFX cards ever since i bought a G3 iBook all those years ago so I'm not sure what to get. I run Lion and I hear some cards are supported out of the box without having to pay through the nose for the official Apple versions. I also hear that, because of the limitations of my machine, some cards won't operate at their full potential. Can anyone recommend a card? 5770s are supposed to be OK, 6870s better - but can my Mac take advantage of the extra power? I'm also bewildered by the different brands, are they all the same, performance-wise? I'm looking to use the card for gaming and it would be great if someone could recommend a card for around $150, maybe more if the performance would be worth the extra. I run two DVI displays but a third HDMI would be nice to add at some point. Thanks guys!