Re: worth it or not.
The Crossfire is a great car, a fantastic car for the money. With the SRT6 you get everything, bigger wheels, brakes, suspension and the transmission works fantastic in the shift mode, plus you get an even rarer car. I don't think you could go wrong with either of your choices but being the owner of a SRT6, I can say, I've never been disappointed that I spent a little more for it.
Dave