Looking for insight and advice from the gathered experts here. I have a 17" MBP, which I love of course, but it's far from portable. I need something portable, and am considering the MBA 13 or the cMBP 13. The reason the cMBP 13 is on the radar screen is because of upgradability. The MBA 13 for obvious reasons -- light and very portable. 11" is too small for my eyes. My uses: Internet, email, and Office applications. I have a need to use Microsoft Access for one of my projects (not by choice), and would therefore need to run Parallels to use it. Therefore, virtualization is also a requirement. Can a 2012 or 2013 MBA 13 run Parallels sufficiently? Is 4/8 GB RAM sufficient? Is 256GB (the largest SSD available in these) large enough for Win 7/8 virtual machine? Liking the cMBP 13 for it's ability to be upgraded to 16GB, but not liking the screen. Liking the MBA 13 for the same reasons everyone else likes it. Just not sure if 8GB/25GB SSD is sufficient to run Parallels. I've never used Parallels before so am just not familiar with the real world requirements to run it efficiently. Not that interested in the rMBP 13. Can't justify yet the cost for it. Would appreciate insight/comments/experience/suggestions. Thanks!