I want to buy a laptop which will be used in revit 2012 with 3rd gen processors

[kush_]

i am confused which is better for rendering in relatation to architectural renderings
AMD Radeon™ HD 7730M DDR3 2GB - ICC
or
NVIDIA GeForce GT 640M DDR3 2GB
also about hard disk
@500GB 7200RPM SATA Hard Drive
or
1.0TB 5400RPM SATA Hard Drive

 

[edit1754]

Which laptops are you looking at, and what are all the components in the configurations? (CPU, GPU, display, etc)