Gunna get a refurb (crossing fingers no issues with pixels) iMac this week. 1. Get the 20" and take the savings over the 24" (same set up) and buy or at least put towards a Dell 24" wide screen (the Ultra version) costing $399-$599...and have a nice 24" monitor for extended desktop and/or for wife's future laptop. 2. Get the 24" Can't really put up two pages on the 20" iMac, tried in the store, but it's big enough for what we do and not concerned about the difference in quality 20 vs 24" in the ???TFT???. Sooo. Anyone have this set up and like it? Wish they had gotten the 24" and why. What should I know about using an external monitor for extended desktop? Any other good quality monitors I should look at in addition to the Dell in similar price range and similar features?