Before I bought my handgun for CC I spent considerable tiem at the local range firing a number of pistols. I fired the Glock 26, SA XDM and XDM9C, M@P9C and Ruger SR9C. After firng many rounds I purchased the SR9C and use it for CC. It felt great in my hand, had a great rigger and was very accurate. It is easy to CC. I have fired over 1500 rounds without a single problem. My second choice was the XDM9C.
I also own a PPQ9. Fantastic gun in many ways but I found it a little too large for CC.