Any reason I shouldn't get the previous version of the 3.06 imac with the 880gt 512 card vs. the new 2.93 with GT 120 card (purchasing refurb either way)? I just don't see the value in the additional 300 for the new 3.06. I will rely mainly on external storage for my Photo libraries, and a majority of my actual "work" is done in Aperture and Photoshop. My wife will put together a couple of iMovies every once in a while, but our current 2.0 imac handles that fine. My biggest concern initially was not having the ability to run a 30" with this machine, but I have opted for a 27" monitor for extended desktop/TV services, so the previous version will work for that. Thoughts? Sorry if this has been addressed previously, I have been searching but didn't find any relevant discussion (that doesn't mean it hasn't happened though).