Well, a five angle valve job isn't very good of a choice for a street car, as tenatively they should be re-touched up every once and a while, where a three angle does not.

As far as going wild in your head....in order to do up a good head job, you should have some decent compression to go with it, otherwise its scope is limited, and the power you can extract from the head is minimal, even with a good set of cams. Realistically, from what I've found, and no one ever really likes to listen to me, but, leaving your car at least close to stock, is about the best thing you can do, and later on, you'll wish you had....

Later,
Aj