I've had previous experience with building my own PCs before I switched to Macs in 2007. I have a MBP but the 8600m gt in it is starting to get dated especially when running StarCraft 2. And I can't afford a 27'' iMac. I want to build a gaming rig for around $500 to mainly run the latest fps games on high/ultra. I want: -OS X along with Windows 7. -AMD quad core (I'd prefer an Intel quad core if the price is right) -ATI Radeon 5xxx series card able to easily drive a 24'' display -4 GB RAM I need help with making sure I buy BEST VALUE components and they would all work under OS X. I haven't made a rig since the days of the Athlon 64 so I don't know if any procedures have changed with assembling and dealing with newer standards/tech. Also, what's a good and cheap 24'' (atleast 1080p) monitor?