Haha, I did the math for the same... I'm in Orlando, went with Orlando Dodge and am paying $2700 more than DD quote... But, I have a trade. I would have had to sell it privately and then fly out and drive back. I'm getting a decent amount on my trade, maybe I could sell privately for more, but, maybe not. For me, the trade equates to about $2,100 in sales tax savings. I figured travel would be $1000 or so. That would have left me absolutely needing to sell for at least $3k more than I'm getting on trade to make it even close to worth it. And, the timing would have had to be amazing.
Also, DD requires using Chrysler financing (for their pricing) which is a very high interest rate that I would want to refinance as soon as possible... Too many layers of things to deal with for me to make it worth it.
If you're closer and/or don't have a trade, I can't imagine not dealing with them, but, I couldn't make the numbers work for me.