I give the CTS-V credit. It is the best American sedan you can buy IMO, but also IMO the best sedan from America is not as good as the best from Germany. Sorry, but they havn't jumped far enough ahead with the second gen CTS-V to leapfrog the M3/M5. Once again, that is just my opinion and how I personally feel. The CTS-V is a great car, but just not what I would be looking for personally in a car with regard to style or dynamics.
I will also say, that I am quick to point out all of BMW's flaws as well, even though I may be a little quicker to forgive them than other manufacturers.
By the way, Caddy has gone the way of MB with the large displacement engines and massive gas guzzling power. It will be interesting to see what Caddy does with future CTS-V's when BMW, Audi and other have moved to smaller, lighter, more efficient FI powerplants.