I am having a touch time deciding between these two. I can get a 15.4" 1.83Ghz MBP for $1100, it is used still under warranty. Everything else stock. I would take the RAM to 2GB. I could possibly get a used C2D 2GB Macbook for $1100 - $1150. What would be the best way to go? I will be using aperture for photography and at home it will be hooked up to a 20" and my BT keyboard and mouse on an iCurve . Any suggestions?