I currently have a 2008/09 MB Pro with 4GB of RAM running, among other things, Parallels in order to use Powerpoint and Excel. I use them regularly and depend on them but my machine is getting old. My wife has an Air and I love the form factor and weight while traveling, working on the couch, etc. The challenge or question I have is whether 4GB is enough to really get the kind of performance I'd like. It's not enough on what I'm running now (assuming it's not the only problem, though) as I'm seeing some bogging down and the system stats have shown us that memory might not be high enough. In a perfect world, I'd love a MacBook Air with 6 or even 8GB of RAM but don't know what, if any, plans exist to increase this. I'm curious as to whether anyone has had solid experience with this and can offer their perspective. I realize I can go 13inch Pro but am hoping that this could work out quite well. Thanks!