Hi! I am preparing to buy a 15" 1.67 2 gb RAM PB, with 64 mb video adapter. Will there be a significant performance boost, if it had the 128 mb adapter instead? Im going to use the mac mostly towards final cut and perhaps cubase, and graphic adapter boosts game performance most, right? Thanks for any help! Regards Håvar Ps: Does anyone know if having 2gb ram decreases battery performance in any way?