yes, sounds right (with 8 Gig you can easily afford to optimize for the VM, I'd think). As to whether to assign 2 or just one virtual processors, best is to try it out. On my MBAir assigning 2 processors to the VM may cause the CPU to become quite hot, which in turn causes the Mac OS to turn off one of the cores which then makes the VM slow until everything's cooled down again (ah, those pesky thermodynamics) - so I only use 1 processor. Your results may of course vary. Just try it out :-D (but make a backup of your VM before)