[welfare]

i don't think it's fair to dismiss the potential of a D-NA build. 180 to the crank is not all that difficult to attain on a single cam. i mean, break it down. what are we looking at here? what's the difference? it's got the same displacement as a b16. it's lighter. the rotating assembly requires less force to move a single cam. it has the same number of valves. so what is the big difference? 2 separate cams to run the intake and exhaust valves? that can be offset with the right choice of cam. all you have to do is look at weak points and improve them. you can stuff air into a d-series, compress it and blow it out just as easily as a b.
there are some pretty sick d series builds out there. they didn't require boatloads of money. just research, the right combination of parts, proper tuning, and more research

obviously, when you start off with a b-series, you're starting off with more power. you're also paying a good chunk for that swap. is that chunk worth the extra 40 some odd hp? people will argue that the potential of the b is greater than the d though. i disagree. the potential of your engine is only as great as your research, your machine shop, and your tuner