Prior to 2007, I was a PC guy and built a few of them. Then I got my first Mac, which was a Macbook Pro and I loved it, but was fine with it not being that capable of a gaming machine. I still have that Macbook Pro, but recently acquired a mid 2010 Mac Pro for free and was wondering about swapping graphics cards. Now, as I mentioned, I WAS a pc guy, but that was a long time ago and I'm very rusty about computer components these days but I want to know what my options are regarding buying a new graphics card that will work in this Mac Pro. I don't want to spend $400+ if possible, I don't want a powerhouse top of the line card, just a more recent one. Any suggestions as to what my options are?