www.importbuilders.com
www.crvtec.com
they have a B20 engine that is fully built already....it makes like 240HP i think. it will cost a lot tho....but it gives you an idea of what you could build yourself......and the potential of the honda b-series.
i am a B20 freak.....so whatever you ask me i will always say go B20. but really for NA performance it's seems to make sense to go with the biggest motor possible.....2.0L vs 1.8 vs 1.6........easy choice for me. a B20 motor with a B20 head and some high compresion pistons would rocket you through the quarter mile. I think a CRX with a stock B16 would put you in the mid-high 14's......i figure a decently built B20 would easily put you into the low 14's or even high 13's.....and a fully built one should put you into the low 13's or maybe even high 12's. just to let you know i have no actual hands on knowledge....i only know what i've read. so you may choose to ignore everything i just said.