My primary desktop computer just died (harddrive failure). I was trying to prevent this from occurring for as long as possible, as there may be new iMac refresh around the corner. But unfortunately it just croaked, and now i'm in need of a desktop. I was planning on getting (my first) iMac (27"). Do people really think there will be a significant upgrade in the new lineup (supposedly) coming out in Sept/Oct? I guess the only major thing I would really wait for is Retina... but this is probably hoping for too much- thoughts?