We have Corian now. It is very nice. However with lots of research, granite seems to be the best choice for resale value as this is very popular now. ( Just my 2cents) The cost difference for us wasn't much. If I remember correctly when we chose our upgrades, the difference between corian and granite was about $400. This was with no changes to the layout of the kitchen. But there is an extra cost when keeping a piece of the counter for the slide in range (if this is the stove you choose). When upgrading your counter top from th standard laminate to corian or granite, the difference does not seem to be too much since you are already looking at a couple thousands for the initial upgrade.
Sorry for babling, chose the style you prefer. Enjoy
