IMac 20-inch 2GHz Intel Core Duo

I'm looking at getting a new computer relatively soon. I was kindof thinking about going to an iMac. I may be moving to Japan in a year and don't want to hall a huge computer over there. I was thinking about the 20-inch Intel Core Duo. I don't really want to pay a lot for a nice laptop and I really like the iMac. What should I get for developing with Torque? I'm trying to keep the system small but powerful enough for TGE and TSE.