I have used them both trigger systems and all the calibers offered by Sig. I shot all the platforms also, though not every single model listed in the poll. Hopefully I will be able to rent the Stainless 220 next time I go to the range. And all the ones I've used I felt fit me great. I will report back after I rent the stainless. I like the idea of having a heavier gun for on duty to facilitate faster follow-up shots and using the alloy frame for off duty concealment. Same mags, grip, and holsters.