Hey MadFast,
Almost congrats on your almost purchase! I know you've been looking for sometime now. I recently bought my NSX out of state and thought I would give you some of my info!
"How can you drive it back?"
Well, thats kinda up to you? I rented a car from here at 2AM, drove it straight there, and checked out the NSX, and returned the rental there while I purchased the NSX. Only got charged like $80-$90 dollars.
Insurance, well I got it before I left to get the NSX, and told them to start it on the day I was to pick it up! They faxed me a copy of the Ins. card for me to carry around until I got the real one in the mail.
And about the plates, I 'think' its ok to roll back with the plates that are on there until you get the car registared in your state? The guy I bought my car from wanted to keep the plates, so I drove with no plates what so ever! But I did carry the Wire Agreement(as a reciept), the title having just been signed over to me, and Ins., oh, and my valid license. I don't think cops would write you a ticket with this much documentation.
Also, I paided by wire transfer. I checked the car out, then we took it to the Acura dealer where they checked it out also. As soon as I had the green light, I called my bank here at home, told my banker to wire the money(had the wire agreement already typed out and signed sent to her). Shortly after we got to his bank, the funds were in his account. The title was in my hand, a smile was on my face, and I began my way home.
Good Luck,
Z