The advise about renting guns at the range is very good. Reading through this thread shows that inside any given spectrum of guns (quality/price range) there are many variances due to personal preference. Its nice to have choices
One thing that you didn't give was what you planned on doing with this gun. Home defense, range toy, carry gun, each can put a different slant on what the best tool for the job is. For example I carry a Glock 19 every day at work, I hate the thing for many reasons but I shoot it well even though it feels like I am dancing with a fat chick when its in my hand. The trigger sucks but is workable. I carry it because it is reliable, cheap and is exposed to some pretty nasty chemicals. I do not want to trash one of my Sigs.
As a night stand gun I will not use it. I can not see trying to get a hold of it in the nightstand,in the dark, mostly asleep and hook the trigger inadvertently. Now you have an AD just waiting to happen.
Outside of work I carry a DA/SA Sig. The "dreaded" DA pull is not a thing other than putting rounds through it to understand the first shots feel. In a defense situation the distance is likely going to be short so the whole DA thing becomes a non-issue. If you can't hit COM at 15' the DA trigger is not your problem. Longer distance/more time, cock the hammer and have the SA sweetness.
If its only a range toy all that matters not.
If there are kids around an external safety adds an extra level of protection there over a simple trigger pull of a striker fired, or a heavy DA pull. This is until they are old enough to be taught, kids add a dynamic to having a gun around that should be thought about. All the different systems need to be learned to the point of muscle memory. Arguably an external safety can cause issues under stress but again training helps to mitigate this.
You have obviously narrowed to quality handguns which is a good thing. Buy cheap and you stand a high likely hood of buying again. Buy once, cry once.
If you go range renting, try a Sig 320. I have heard a LOT of good things about them and the pricing seems to be lined up to be in Glock's face.
Good luck and have fun testing.