b18/b20 setups

So im looking at buying a new honda, and of course i will buy cheap, then do an engine swap. This make the car cheaper, faster, and i love working on cars. Now my toughts are a b18b or b20b. The question does not lie here. The question is about getting air into the motor. Now I know that you can build a lsvtec, and b18b's a great for boost, but dont both needs some real engine reiforcement. The question is what to do first? boost or swap the head. What will the price tag be on both mods? and what difference will be expierianced? Right now my thoughts are to boost first, then think about doing the head swap later, just because i think thats a safer, stronger, faster setup. Let me know what you think.

to add, that's VTEC...not Vtec. and im thinking turbo and not add the VTEC head. Spend the money that I would spend on the head on internal mods, then just crank up the psi. Isnt this creating a higher compression, and therefore doing the same thing?