Hey guys, I'd appreciate some advice as I'm unsure which is the correct move. I currently have a late 2008 unibody MBP 15", with a 2.4ghz core2duo and 4gb RAM. It requires a new battery, but it's starting to get a bit long in the tooth, so I'm thinking of replacing it with a new machine instead. I use my MBP for basic computing, but I do play a couple games (mainly starcraft 2) and I do some basic photo and video editing. I also connect my MBP to a a large external display when it's on my desk, which is most of the time. I had thought of going to an iMac as I don't take my computer off my desk much. But I like the simplicity of one computer that I can take anywhere if I wish. I've been eyeing an 11" MBA, but would it suit my needs? Particularly one of the new sandy bridge models about to be released, topped up with at least 4gb RAM. I'm concerned that it could be even slower than my current MBP, or at least not noticeably faster. Any recommendations?