I'm looking to by one of the 20' 2.4 core 2 duo iMac refurbs from apple store, but I can't make up my mind which one to go with. The choices: 1. first gen alu with 800Mhz bus but better graphic card with more memory (HD 2600 Pro with 256Mb) OR 2. 2nd gen alu with 1066Mhz bus but with the basic HD 2400 card with 128Mb. Price difference is negligible. Which is a better choice if I don't play games and use it only for basic stuff (iphoto, MS office, internet, balancing check book ) plus imovie editing? Thanks for your advice.