That was my view too, there are other good engines around, and MMC have a good working relationship with Omex, down the road in Cheltenham, who are marketing the 2.5 Duratec in various states of tune. Need I say more?
I agree Paul and the 2.5 would give torque right up through the range.
However further down the line if you were selling a +4 with Omex 2.5 or a +4 with a factory Cosworth engine (a +4+) we all know which would hold value.