STG77 -
Man you sound a lot like me. I'm a big Glock fan but they do not fit my hand well either. I shoot them OK but I shoot other handguns better. Still for carry, I prefer and trust the Glock more then the others.
I also prefer a DAO type gun for "business" so I too started looking at other options. I think Sigs are great guns but I've not had much luck with them so I ruled the Sig\DAK's out pretty quickly. I started really looking hard at the HK P2000 LEM until I finally got my hands on one.
The P2000 felt great in my hand but that LEM trigger was another story. It is drastically different then anything I've used before. They mag release location on the HK's are another issue for me. They are designed for you to use your middle finger, instead of your thumb to release it. Neither of those things make it a bad pistol but it was easy for me to see that the HK would take a lot of training\practice for me to become as familiar\comfortible with it as I am my other handguns.
I looked at and considered other guns as well but to make a long story short, I realized that there is no perfect hand gun out there for me. Everything out there has at least one or more short comings for me and my needs\preferences. Once I acknowledged that, I quickly decided my time and money would be better spent becoming more proficient with my Glocks as I already have more time "invested" in them and they have already earned my complete trust.
Hopefully some day Glock will come out with a Gen4 frame that will incorporate replaceable grip inserts so that we can adapt the grip to better fit our hands. I have no doubt it will happen at some point considering that almost every other manufacturer of polymer framed handguns is already doing it. I'm just not holding my breath that it will happen anytime soon.
Good luck with your search