Until the NSX, supercars were impractical, temperamental things that cost a fortune to run. But Honda changed all that, with a car that's stunning to look at, fast and handles superbly - yet it's also docile, reliable and needn't cost an arm and a leg to run. Many owners are hanging onto their cars, unable to find anything comparable as a replacement. Try one - even briefly - and you'll immediately see their predicament.