I've gone from a 467 bhp Cossie to a 320 bhp Evo. Yes it is physically slower, but to me still feels very quick and laps Combe and the Ring at the same speed as my old Cossie - quicker in every way other than outright straightline speed.
I regret the loss of power, but am so happy with the rest of the package that the loss was worth it.
Get it up to 500 bhp plus then see what you think!
Si