each to there own mate you have only got to look at Christians and Tony turbo`s series 2 with the 1600cvh (slightly modified of course) and there top speeds they can reach to know the cvh has big potiental.

The zetec has its own bonuses but i have`nt got a clue about them some of the zetec guru`s will tell you on here but as said before its up to you and what you want from your engine

The cvh has a big power surge when the boost kicks in and the zetec is more like a long pull from the word go and they pull like a train when they get goin.

i might be wrong on the above, but the cvh and zetec guru`s will put you straight mate

Andy