I believe the V10 model of the Touareg has more power and torque than any of those, even more than the Viper's V10. (The VW reviewer also thinks the VW looks much nicer than the Cayenne--I haven't compared.) I couldn't do much for price comparison--money conversion and import costs skewed the numbers I was reading.

Note that I wouldn't likely be willing to pay for any of these vehicles, but they're nice to look at/read about. :)