I might add that ANY Duratec feels torquey, even a plain vanilla 226bhp 2.0. I was very happy with that engine, I just wanted to build a bigger one, because I could....
For me it all comes down to price, if I could find a good cheap 2.0, I would go the route AMMO is planning for his, the 2.0 advantages of a little less weight and height are just a little bonus. However if you can get a 2.3 for the same money, then its obvious to go for the cubes.
As to wear, I would argue (and AMMO is much better qualified to comment) that the extra revs of a racier 2.0 would be offset by the wear done by the extra piston speed of a 2.3. Not to mention the longer run of the camchain on a 2.3. Swings and roundabouts, whichever it is, I am sure you will be happy. I agree with AMMO, decide on your spec at the start and stick to it. Unless of course you like working on your own engine.....
Duratec SV, built in Dubai