Tcro, all I can say is my front brakes feel just about the same as a new FJR I test drove. If the bike wasn't so heavy, I might be able to do a two finger stoppie.
I'm not sure about DL calipers, I just used the DL650 adapter brackets made by SV Racing. The change from 2 piston to 4 piston and HH pads even with stock rotors is night and day.
Of course, as always, YMMV.