how many turbo cars you driven? how many rotor cars you driven? you should base your decision on which one you like better, and try build it yourself its much more rewarding
personally i think you should rotorise it!

i'll go a heavily ported n/a rotor over a ca18det every day of the week, the sound is just awesome and there's plenty of power. mine used to power skid no worries just stomping it in 3rd gear muhahaha lol