Depends on how well you want it to run. What's your point there Lee?
Regarding the clutch, Evo's ARE heavy on clutches, also the flywheel shouldn't be refaced, so even if you decide to go down the route of a 'conventional' clutch, that'll still cost is excess of £800. It's an expensive gamble IMO that probably won't last. Also, whats the point of having 400bhp if the clutch can't take it and we all know that driven as intended, an Evo clutch WONT take the torque associated with 400bhp.
Yes, I forgot the incidentals you mentioned.