if your happy with the power and how it drives then throw the dyno sheet in the bin, as at the end of the day it's just figures on a piece of paper (provided it's not showing dangers lean out conditions etc)
but yeh it'll happily provide more boost if you want it.
cams: i fitted NA cams cause i had some around and could do it myself. i prob wouldnt pay someone to fit na cams, but if i had some 264's around then i would.
but as said if your happy then dont worry about it