While I'm sure the coupe will be the better performing of the two models (coupe and sedan), as much as I've looked at the CTS coupe concept from all angles, I simply cannot get excited about the design. To me, the rear end looks high and somewhat stodgy. In contrast, I think the sedan's lines are close to perfect. Thus, despite the fact that I don't have a family, nor do I have a particular need to haul people around, I plan on springing for the sedan.
Of course, now that I've said this, when official V2 coupe pictures are released, they'll probably be remarkable and I'll have to eat crow for posting this.