Currently have 2.8ghz quad x2 macpro with velociraptor boot drive and 5 other hds. Recently been thinking of selling the macpro on fleabay and trading up for a 27 inch imac i7 with 16gb ram. I can live with trading up my hard drives for one larger external drive. Really thinking of trading up primarily for the 27 inch screen to match with my 23 inch ACD. My only concern is longevity. This macpro doesn't hesitate and will work for years to come. It's quite and solid. I recently replaced two imac hard drives in customers computers. (one alum 2008 one plastic 2005) and am concerned with how hot they run. Maybe imac with SSD? Does anyone think I will be disappointed with speed vs macpro? thoughts?