Hey guys, I would like to seek some purchase advice from you guys. I currently having a iMac 24" (early 2008). I mainly use it for leisure, like browsing internet, itunes, iphotos and little bit of word processing. As the iMac is running a bit slow (reaching its 5th year) and I am pretty sick of sitting at the desk to use the computer during my leisure time, so I am considering to have a laptop so I can get rid of sitting at the desk for the whole day. Will probably get a MBA 13" (with upgrade to i7 and 8GB ram) and external hardisk would solve the storage issue. However, as I am not in an urgent needs of a new computer. Would it be better to wait for the next generation of MBA with retina display? Foreseeing a long wait?