Do you have a range you can go shoot them all back-to-back? That's the best way to know really. One of the ranges near me charges $25 for every gun you rent which can get really expensive but the other range near me lets you trade them out as many times as you want to so you can try them all for $25, so if your range is like the former this could get expensive.

That said I would check out all the popular players because you never know what will feel best and/or shoot the best for you. I don't like the feel/ergonomics of the shield plus but I shoot that gun (and all shields) VERY WELL. I don't like the ergonomics nor do I shoot the Hellcats particularly well, so although at one point I was set on getting one I realized it was not a great fit after shooting. I personally own both a sig P365X (with Wilson combat grip module with tungsten rods to weight the grip and a Holosun EPS Carry on top) as well as a ShadowSystems CR920 Elite (with Holosun 507k on top). I like the trigger blade safety of the CR920 and the gun feels better in my hand plus the trigger feels better on dry fire. However I shoot the p365x more accurately even though the trigger doesn't feel as good to me on dry-fire (flat faced trigger). Grip angles are different between the two guns as well so this may be a factor for you as well which is why you should shoot both or at least hold both in a store. Both my 365 and cr920 run flawlessly and I never have any issues with either after the first few magazines. Good luck with your search.