you can build a 300whp+ d-series bottom end for about $1000. i wouldnt be arguing this point if i knew a d-series built bottom end would cost 2.5k, id tell this bloke to do a b swap straight up.

stock D's can handle roughly around 220whp , thats 160kws!! for a daily driven civic coupe, thats plenty for me. hell, id even be happy with 120kw atws. for a safe leeway, i wouldnt go passed 190whp on a stock D.

There are people building d's for the simple fact that its alot cheaper compared to building a B. a boosted high comp D would be as reliable as a boosted hi comp b, its all in the tuning & tuning boosted high comps are a little trickier to low comps...