I'm still teetering on the line between options.I will more than likely stay NA for a plethora of reasons. One being that I have a GTPP so id like to get good use out of the shorter gearing. I feel boost would be better with longer gears. My next and probably biggest reason is that 435 bhp is already plenty for me. I am used to NA Hondas, a boosted V8 is just overkill for what id need. I am still stock minus mufflers and an x pipe. I fully enjoy the car as is and I still have peace of mind that I have warranty just in case. As time progresses I will slowly start modifying the car. I like your original plan, however, I don't foresee myself changing heads or the block. I think the motor is stout as is. Intake, intake manifold, headers and a tune should be more than enough to put me in prison if I had the misfortune of giving a little gas on the highway with a cop present. I am more of a curvy mountain road carver than a straight line guy. I'd like to get as much weight out of the front end as possible. Boost is not going to help that. 450-500whp would be perfect for me. Enough to keep the typical Honda and Subarus in their place but not so much that i'm blowing through tires and gas. In the back of my mind I also think I may trade up for a used Shelby as they get older and more dated, therefore more available.
Cliff notes: I'd like to see a solid NA build as nobody does them. I also know boost is cheaper and easier, so I understand you taking that route. Do what you think fits your wants and needs.