Yep, 2011 Cadillac CTS-V Sport Wagon 0-60 mph 4.2 Quarter Mile 12.5
That's pretty quick and your going to enjoy that. In the corners they are fairly good and can be made to really handle. The problem is that your wife will complain that the ride is too rough. Now, if you have magnetic ride just leave well enough alone and put into competition mode. That is good enough for a cross over vehicle and find the money for a real auto cross car. Maybe a good C4 used cheap with a SC. That would make a awesome autocross car. Or, if the budget doesn't allow get a Miata for autocross.
I do not think the Caddy is going to make a great autocross car. They tend to blow their air bags.
http://www.youtube.com/watch?v=T7-osPfx7Vo
However, on the strip I'm always impressed.
Congrats on your purchase.