Not a fan of the 996 interiors, or the boxsters of the same age, think they are a little low rent for a car that was at that price when it was new. Followed a 996 C4S round a track a year or so again, and apart from gaining a yard or so on the exit of the corners, where the 4WD helped, i keep pace with it on the straights, so was a little surprised by the speed of them. A friend of mine has recently bought a S1 997 C4S, and that is incredible, from the nice interior to the speed and handling of it. Having had a very recent experience following a 55plate Aston V8 Vantage and the 997 C4S, id say they are very similar regarding straight line speed. Not sure what id pick over the Carrera or the Aston. Id say the 997 is worth the extra if you can stretch to it, but would say the extra maintance and potential issues with the 996 era cars isnt worth the step from an HR 350. The 350 is also a rarer car too.