I'm not as young as I used to be (28 now), but I've been very happy with progressive for the last 10 years or so, they've been very reasonable, with my age, past cars(S2000, RX7 TT), and driving record (No crashes, but a fair amount of tickets). I think progressive weighs more heavily on whether you've caused accidents to determine if you're likely to have an accident, and not put a lot of stock into how many tickets you have, whereas most companies jack up your rates for whatever reason they can. Progressive also uses your credit report to determine your rate, though I'm not sure to what extent. My rate didn't go down at 25, but this year it went down about 30%. Currently I'm at $1600 a year for full coverage (100/300/100) on the 95 nsx, liability/uninsured motorists coverage on my 93 miata and 03 CBR600.I also have theft coverage on the bike.
Is your nsx your only car? I think you may pay less to insure 2 cars than 1 if you reclassify the nsx as "recreational toy" and something cheap and basic (civic,corolla, etc) as your daily driver.
Will