The 27" inch iMac screen is getting to me, and I'm wondering if now is the time to go with an i5 or i7 iMac? Can I assume that these two newly chipped iMacs will outperform my 2.66 2006 MacPro? Note I have an ATI 3870 and a four drive RAID0 in the Macpro. I use my current set-up for some occasional Lightroom work, surfing, WP, and stream media like Hulu and Netflix. I've recently seen a rumor that there may be a new 27" display coming. If the price was right maybe I could get it and keep the Macpro. However I don't really see me buying another desktop as I'm looking for less heat, less noise, and smaller footprint. While I like the expansion capabilities of the MacPro I'm thinking I could live with the 27" screen and could re-task one of my current screen as a second one if I needed to.