Hi Craig, I agree with everyone else, sell the SD's. That's what I did with mine. I'm sure you will like the Piledriver. I'm just finally putting together my nailbomb guitar (Kahler, HSH, NB/IT/NB). I have to see how Ben likes it once it is finished.
I think you already have a set of Black Dogs, so I won't suggest those instead of mules, but I am really liking the Riff Raff/Stormy Monday set I have.