I don"t get it. A signed deal with deposit is a deal (except possibly if mfr has a price increase). If the dlr tries to bump you, contact the state AG and get him involved.
Avalanche is a great color in bright sunlight, a little battleship gray looking when overcast. You have the advantage of any color/form of stripe, if you so desire. Keep everyone posted.
Sucks for dealers too. The good, but smaller volume dealer, may have faithful customers who'd like to buy a special car from their favorite dealer, but the dealer may only get one 350 and no R's.