Hi Gang, I currently have 15" PB 1.67ghz, as well as a Dual 2ghz G5. I'm thinking that now that I have the Dual, that I no longer need this much power in a Laptop. Possibly thinking about Downgrading again to a 12" PB. But getting the 1.5ghz Model. Do ya'll think I should stick w/ the 15" or get the 12" and use the extra cash for RAM and what not.