I've been reading up on graphics cards lately, but I still don't fully understand them. I've heard that a graphics card that's good for gaming might not be good for design work (photoshop, after effects, Cinema 4D, etc.) What is a good graphics card to fit those needs? I've got an early 2009 Mac Pro that will soon have updated firmware to 5,1 in order to do the 12-core processor upgrade. I'm open to flashed cards from MacVidCards as well. My budget is about $500.