I recently upgraded my old battered laptop to a shing Sony...It has the ATI 9600 mobility chip (64mb-128mb user defined) and using Fs2002 I get around 25-35 frames per sec when using the B737 or A320/330 add-ons, which is more-or-less liquid speed....Very pleased compared to my last effort which had a S3 Savage chip (32mb shared) ! That averaged 8 frames per sec which meant it was all very jerky and stuttered at 50 feet as it updted itself ! Annoying !
Best if luck with your decision.....