I think, and I say this primarily based upon what I've been reading on P-F, that HK seems intriguing. If I were to ever explore that avenue, I'd probably be looking at something roughly sized like a G19 or between a G19 and 26 and most likely with the LEM trigger.
However, before that should come to pass I'm sure I can find something about both HK that will leave me shocked and dismayed...and about the LEM that would make me fear to carry it AIWB or which would result in my getting myself kilt in the streetz.