What are your thoughts on purchasing an iMac right now? I am in need of a good desktop computer to keep me focused and at my desk - as well as a computer that can pretty much double as my TV. The only problem is they haven't seen a refresh in forever. Should I wait? Or is it safe to take the plunge? I won't mind missing a spec bump, but I would be a little stung if I purchased one right before a thinner, sexier redesign.