Get a 5 speed w/ the Duratec, in a Caterham. SVs are heavy, over there they're referred to as FB (Fat Bas...).
If you don't care about retained value I guess you could consider a clone
I'll have a 2.0L Duratec for sale later this summer, turnkey, w/ all SBD goodies etc. It's around 200 hp. Absolutely trouble free, they're great!