All you really need is Vitara pistons, forged rods, sleeves, and everything else that goes with a turbo. It'd be wise to use forged pistons as well, but most people don't.
The five angle valve job is meant to harness every last bit of power from the head. Something that is, quite honestly, a big waste of money if you aren't racing competitively. A renewed three angle will be just fine.
On the flip side, a properly sized turbo will exhibit most of the same characteristics, which is why there are turbocharged F1 engines. I mean, how often are you going to be below 3000rpm while racing?
Read my previous reply about the actual cost of things.