Just want to put this out there....
Any reason why you are going w/a semi-auto ? Try a good quality S&W revolver....you'll love the trigger.
SW TRR8
But I guess if you're gonna go semi-auto; go with the best
USP Compact 45:
The only words of wisdom I can offer (after carrying on/off the job for over 10 years..) is ya gotta go with something comfortable in the hand. It needs to be an extension of your limb; not just some badass looking hunk of metal.
Also, if you are considering CCW; most of the weapons you tried will be too big to lug around and tuck comfortably.