I plan on getting an Air strictly to make some simple iPhone/iPad Apps with XCode 4 and do light web browsing and email, watch movies. Will probably also want to upgrade to Lion. I'm looking at an 11" Air with 64 GB and 2 MB RAM. Am I really 'cutting it close' if I want to use XCode 4 with these lowish specs? (Assume no other major apps running in the background). Also, in your opinion, should I bother waiting a month or so for the Core I5 refresh? Anyone know if the Refresh will have an Ethernet port built in?