I have a 13" MBP and have been yearning for more screen real estate. The old model 17" are $1700 in the refurb store. I heard those are mostly new, unsold models that Apple never sold before the refresh. The hardware is fast enough on my 13 (2.26 ghz), i just want to upgrade to a bigger screen. Seems like a good way to save a lot of money and get a 1920x1200 with similar hardware then i have now. I dont know how much use the discrete graphics would see, probably not much at all (not a gamer), so I dont mind switching manually. Is there a compelling reason to spend the extra $550-$600 to get the new model?