Yeah, insurance is usually the big killer in buying cars of this caliber.
I've got a 1991 Black NSX on hold for a month or so till I get some final items straightened out, but before you get any car, gotta do some research on not only insurance, but also probably cost of maintanence,repairs, and ownership. If you can afford the car payments and the insurance and stuff thats cool, but if wind up not having enough for cost of ownership and maintanence, then make sure you got all that as well.
I agree, State Farm has very good deals on insurance. Im currently with State Farm (AAA finally go bye bye) And insurance on my NSX, with the insurance on my current (going-to-be beater) car, it will only cost me $84 a month. Im 25 1/2 years old, with multiple car discounts, seat belt discount, 50/100 liability, full coverage, blah blah, pleasure driving on my NSX (Living in Michigan you can only drive it 6-8 months of the year), and most importantly, no driving infractions at all since I started driving.