I have been thinking about replacing one of my 3 original white intel 20" iMacs with a new iMac and happened to see this refurb. It seems like it's really quite a bit of nice Macintosh for $1k, so I ordered it. It will be running Lightroom 3 driving a 61" theater screen to present images to clients. May do a little CS5 Photoshop editing on it as well. It seems like this is a great machine for this purpose at a great price... am I wrong? One of my aging white 20" intel iMacs has been doing this job for a number of years and it's feeling pretty sluggy lately with the ever larger files I'm shooting (Canon 5D MkII) and running through Lightroom. And being a refurb, it's likely all checked out extra closely, so the chance of a problem machine is reduced, right? Does Apple accept returns of refurbs if I should decide I don't like the performance of the machine?