boost = turbo or supercharger.... in this case, turbo.
If you have the funds to go with a turbo setup now, then do it.. if you start building your naturally aspriated car (no turbo/supercharger) up, and decide to do turbo later,you will eventually need to replace, and probably loose money on most of the bolt-ons that you will add to the car... things like intake, headers, and probably most of your exhaust.

Go with a turbo on a DOHC motor... it is the quickest, easiest, and cheapest way to make your honda really quick.