Well - I have my 94 V-Spec2, stock, Grade 5A and 22,000 genuine kms (full service history) insured at 55K and I don't think that's excessive....
Paid 35K at Auction 2.5 years ago..... (Thanks Iron Chef ;-)
Glad I got it when I did - not many like it left
Might sell it to Yankee land in 2019
Cheers
Andreas