I own a 15" 2010 MBP and a 13" 2011 MBA. The specs on the MBP are significantly better since the MBA has limits on how much I can upgrade to. Both were maxed ou

I own a 15" 2010 MBP and a 13" 2011 MBA. The specs on the MBP are significantly better since the MBA has limits on how much I can upgrade to. Both were maxed out relative to the time they were purchased. That said... 1. I never use the optical drive so that's never been a problem. 2. The MBP is noticeably heavier but that never bothered me. If you prefer a lightweight travel laptop, go MBA. 3. I use Parallels (rather than VirtualBox) to run Win 7 and Ubuntu (and others) and it runs like a champ on the MBP but can lag on the MBA at times. The lag isn't horrible but certainly noticeable. Aside from this, MBA runs like a champ otherwise. 4. I continue to use the MBP as my primary between the two.