I have ordered a 2011 MBA 13" i7, 4GB RAM, 256 ssd. I've searched the forums and have read about 30 threads on this subject without getting any clear consensus. For running VMFusion, what is the ideal configuration in terms of allocated ram and cores for running windows 7 64 bit? I plan on running Office 2010 on the windows side. Should I split the difference and allocate 1.5GB? I can't think of any specific examples right now, but there's always the chance of needing to run other apps in windows, too.