Be careful!! MOST underwriters will insure for what the car is worth (in their eyes!)........I have Grundy Collector Car Ins. (I don't use the car as a daily driver). No mileage limit, and insured for AGREED value. I have mine set at $85K as it is an 05 Comm. Edition, S/C'd, 3:55's, Sidewinder wheels, and some trick cosmetic mods. $1,080 per year.
Grundy also requires you to sign a document stating that will not compete in any timed events. That was the killer for me, due to autocrosses. It also states something about not using the car for any errands, which would make a trip to ******* a question mark.
Check with State Farm; they've been pretty good for me. Some companies won't touch Vipers.
State Farm won't write Vipers in texas - spoke to them today.....
Might also check if your company does OEM endorsement....
progressive covers agreed value.......i have never had a problem with them either.