I know this is off-track, but I had the opportunity to wring out a 1911 format (RRA) in 9MM and really enjoyed the hell out of it. With modern high performance ammo like my old duty load (115gr +P+ in Sig P226) it would be a great carry gun. Even though I reload I still like 9MM because it is real cheap in bulk which means more trigger time. The HK vs Sig choice for me would be the P220 as I have a lot of trigger time on Sigs and find off hand control functions easier.