The 17C is nice in concept, but really provides no gain to offset the muzzle flash and the carbon buildup on your front sight. When it comes down to the G17 and the SP-01 Tactical it will depend on what you are looking to do with it. I have owned both, and still own the G17. I just couldn't adapt to the DA/SA trigger on the SP-01 Tactical. It can be greatly improved with aftermarket parts, but I just never saw the need for DA/SA. The CZ platform is very comfortable to shoot due to the ergonomics and the weight, but if you wanted this for carry, the weight would be a factor also. I personally didn't like the G17 when I tried it, but after adapting to the platform I couldn't go back. Upgrades for Glock are plentiful so you can make it exactly what you want at a lower cost then CZ parts are. If you really want to go the CZ route I would suggest also considering the standard safety SP-01 with no decocker. They are easier to work on and still offer DA/SA if you manually decock it along with SA only using the safety for a consistent trigger pull. Any CZ I get my hands on now gets converted straight to single action only.