Personally i've driven a fairly wide range of cars. My "biggest" car was a Evo 8 with 440 whp and honestly it was fun at first but i do not see myself able to drive something like that anywhere but at the track. My m42 is fun because i can rev it up and go around corners sideways while still in control. I think of it as more of a drivers car and not so much of a "e-peen" or HP-peen ( made that last one up )
Its all about balance of HP, torque, weight. Throw one of those out of whack and you got yourself an uncomfortable vibrating box.