David,
congratulations to your decision for a BayRaider. You won't be disappointed.
Nothing wrong with spinnakering a BR as a singlehander. Due to the short mainmast the spi is not overwhelmingly large, mine is 17 sq. mtrs. and that#s about as big as you can ever get it on that boat.
Sure things can get hairy, but you can always fill up the tank then and sort things out in relative ease.
About the colour of your boat, may I recommend the battleship grey for the hull, it is an unusual hull colour but it looks excellent, especially in connection with the tan sails.
Good luck,
Claus