A 2008 GT 500 for 10 over for about $55,000. You need another $20,000 for the ZO6. I would say the GT 500 is a very fair price even at 10 over. Yes the ZO6 will beat it. it weighs 700 pounds less and 5 more hp. There is a K&N filter system you can purchase for $275 that opens up 53 rear wheel hp and that gets you close to the Vette. The Challenger is not going to be as fast but less of these will be made than the 500's and I think they look much better than the 500.