You should be able to get a quick quote from your insurance agent for how much more or less any car will cost you, if they are helpful.

Use www.fueleconomy.gov for the best mileage assessment. Calculates your fuel cost per year and stuff. Really cool site.

The 5th gen has 190 or 200 hp I think and handles like a dream, but it is WAY heavier than your car. Like, 3,100 lbs-ish. Fifth-gen owners, step in here and correct my numbers, but that's like 400 or 500 lbs more than a GSR? However, the Prelude is nicer and it feels awesome to drive.

Dan