I am looking at getting a new mac desktop and can't make up my mind on what to get. I currently have a 3 year old iMac and a last gen MacBook Pro and need a computer to replace the iMac . My two choices are a mac pro (one 2.8GHZ Quad-Core, 2GB, 320GB, GeForce 8800 GT) at £1270 or an iMac (3.06 GHZ, 4GB, 1TB, GeForce 8800 GS) at £1400. It will mainly be used for HD video editing. I am starting to lean towards the Mac Pro because of the Quad-Core. What would be best?