I'm mulling over getting a Hk45 and was wondering how the grip size(and comfort) is in comparison to the XDM 45 and the MP45. None of my local gun dealers carry the HK45, so I can't fondle one. I've held the XDM 45 and the MP45 and they both fit my hands quite well. I've also held the USP 45 and the grip size was to big for me, as I have small hands and a short trigger finger. Any help would be appreciated.