Don't worry about the haters. They just don't know what SOHC's can do.
I don't know isht about all motor setups... maybe some rods/high comp pistons/all motor cam?
Def. cam gear after you get a cam. Rods will help with higher RPMs. Maybe get a p28 and Hondata s100 from John. Im sure with your current setup, Hondata, and tuning you can get 10 more hp outa what you have right now. The intake manifold also sounds like a reasonable Idea if you don't want to buy an aftermarket one.