Glad you're leaning towards the integra lololol

As stated, don't bother putting b18c2 or c7 into a gsi, just buy a vtir (or a type r if budget allows for it)

As far as things you are concerned about, vtec crossover will be most obvious in the dc2r, but em1 sounds nice on vtec

Vtir crossover isn't as pronounced due to dual intake...

The best advice I can give is similar to amant02 above: if you don't get a type r don't try and make it a type r. It won't ever be one, so just try and make it a nice vtir, you can even make it faster than a dc2r if you want...

Best of luck with whatever you choose!