depends? do you want to make an adventure out of it? the best place is Koons Tysons Jeep just outside of DC. order exactly what you want. fly in. they'll pick you up. do the paperwork and road trip home.
that's what I did for mine.
beyond that you should never ever pay more than 1% under invoice because literally anyone can get that by joining the treadlightly organization. but, you don't need to even join to get that price or better.