I love my C7, and donít have immediate plans to buy the C8. Several of the renderings look very nice to me, but I really need to see the real deal in-person. I certainly donít think it is unattractive, but I do prefer the C7 styling and proportions.
If I had to decide right now, my choice would be to not change. However, I think GM will give me something to make it very tempting, especially if they offer it in a good green color. ;-)