I honestly adore the Challenger styling. Given my history, I'd probably be perfectly happy with the power of the v6, but would probably go for the 5.7l for the sound and the 6MT. I've heard the 6.2 is the way to go, as you say, and there really doesn't seem to be any downside to it. Either the 5.7 or the 6.2 would be a ludicrous increase in torque and power compared to anything I've ever driven barring a few laps in a Italian supercars, which isn't really comparable for a variety of reasons.