I am assuming you'd have to pay the difference in wheel size. I personally would want 20" wheels for the increase in efficiency and ride. I'd consider 22" forged wheels, but that's not what they come with, so that is totally up to you
If you don't think the body work is going to bother you, you could just keep your car after repairs. it's a great car no matter what, you just need to find what works for you.
White on white w/ black wheels is pretty nice. I'd personally prefer white on cream w/ black wheels, but I mean you can't really get picky with inventory vehicles.
Dunno, tough choice. Really tough. I'd probably wait at this point and see what the repaired vehicle looks like. If you can tell that there was work done on it, refuse delivery and consider inventory or ordering again. I'd wait though, to see what your options are when you get it back. You said repairs will be done in about a week right?