So, I think I found a set of wheels I want to go with on my Solstice... TSW Carthage:

They are Mercedes fitment 5x112, but I found a set of wobble nuts that will allow them to fit. So, I was planning on running an 8" front wheel with +45 offset and 245's which will fit fine. On the back I wanted to go with a 9.5" wheel with a +53 offset and 275's, which would move the outside out 21mm and the inside lip would be 17mm closer to the inside of the car. So, basically I wanted to see if they would actually fit without hitting anything. I tried doing a quick measurement and it looks like the fronts would be flush with the fenders, the rears will stick out a little bit, and I should have enough clearance inside the rear wheelwell to fit. But, I figured I would ask the all-knowing experts of this forum just to be sure.
Also, another question: Has anyone ever done 18's on the front and 19's on the rear, a la Corvette?