My 2006 GS is getting old, and I'm looking to get something new. I was sure I was going to get a 4GS... until it came out, that is. I never could quite accept it. Was hoping it would have had a different styling direction. The other mid-sized luxury cars in the segment don't excite me either (5-Series, A6, E-Class). Don't really want a bigger car, but even going up in size the only one I like is the A7.
Looked into some coupes also... Audi A5/S5, and thought about the upcoming RC/RCF, but I prefer a sedan.
Looking at the IS, I think it is a beautifully designed car inside and out. I prefer a bigger car, but then again, I rarely have a lot of people in my car, so I guess I really don't need the space that much. I'm going to test drive it to see how I like it. Problem for me is that the non-F has some options I want, and the F-Sport has options I want, but you have to choose one or the other, which really sucks.
We'll see... maybe I'll be going from GS to IS soon.