So I was about to pull the trigger on a 2011 iMac 21.5" base model for $600, when I had an idea. So at a local PC store, they have a bunch of old Mac Pros for sale, and they had 2 interesting models: 2006 Mac Pro: 2 x 2.66 Xeon 5150, 4gb Ram, 7300 GT for $300 2008 Mac Pro: 2 x 2.8 Xeon E5462, 4gb Ram, ATI Radeon HD 2600 XT for $550 So I was considering getting the 2006 Mac Pro and doing the following upgrades: Upgrading CPUs for a pair of 2.66GHz Xeon 5355. Cost: $70ish Adding 8GB of Ram for a total of 12GB. Cost: $50ish Upgrading GPU for a PowerColor AMD Radeon HD 6870. Cost: Free How will this perform compared to the iMac? Also from what I read, the AMD 6870 should work, it will just lose the boot screens. Im planning on using this Mac Pro for Internet, Music Production, Gaming, and maybe some Video Editing. The Mac Pro plus the upgrades, a decent monitor, and the Keyboard and Mouse should cost around $600 Should I do it, or go with the iMac?