Iíve also used CZ and Sig for many years but now switched to HK. CZ is manual safety and Sig is DA/SA, but HK gives you both with many options. I actually tried Glock before I switched to HK for the light weight of polymer but found that I like hammer much better than striker, and I do want either manual safety or DA//SA. Then I realized HK gives me everything Iíve been looking for, light weight polymer frame, options for manual safety or DA/SA or both (or none), and hammer fire. I donít think Iíll switch to anything else.