mjcxp, I would not buy the 600m if I were you. It is a good deal for the price (that is its only real advantage that separates it from other similar notebooks), but I have heard bad things about its quality, things that were confirmed when I used one. It has a flimsy keyboard that flexes A LOT in the middle, The screen's image distorts if you press on the back (which flexes somewhat readily), it creaks from time to time when you pick it up at one end and/or corner and it overall feels cheap, plasticky and fragile.
I think you should get a Z33A with the extended life battery. it is 3.3lbs, 12inch screen, has an optical drive, is good quality and gets good battery life. It can't game, but thats why you have the 9300. If you have the money, consider the IBM/Lenovo T-series thinkpad. You can get 14 inch screen with a 9600 or X300 (both 64mb), with TOP NOTCH QUALITY, great battery life (again, get the extended life, and you can use the modular battery as well), and maybe enough juice for a non-intense game. (It depends on how you define non-intense; I play quite a bit of non-intense games like Civilization 3, Red Alert 2, and CnC Generals [for Generals, it depends on settings I guess, but I've played well on integrated graphics])