I heard that the Piper cams for the CVH wear down quite easily whereas the Kent cams are made from stronger metal. I'm running a CVH34 and it's not worn down or made any extra noise in all the time I've owned it (granted it gets an oil change every 3k!) but it's pretty unusual for a CVH head not to develop cam/tappet rattle!

I think you should rethink changing the turbo to a T3 mate - you'll be screaming the T2 to get the kind of power you're after whereas the T3 won't break too much of a sweat. Surely as it's such an expensive component the reliability would be better to run a larger turbo - those people who say it's laggy etc. obviously don't drive through the gears properly!

Cheers,

Andy