I would say stick with the EW4 just because everyone slaps those fucking ZC teg engines everywhere.
you CAN get an EW4 to be as fast as the D, it's all about tuning! hell I got my last one to 14.2 with not too much! this one I am expecting lower. shit.. I got a time slip someplace, I'll scan it and show you.. but go EW4 if you have to choose between those to.. you'll get more respect, i can tell ya first hand.. people love you when you beat them with a SOHC 1.5L engine, rather than a swap..
the other thing is, most of the parts that are available for the D16 are available for the EW4 also, as long as you act fast. (cams are cheeper, you only gotta buy one!)
that 125$ engine does sound tempting however
