Interesting game.
If I could have only one I’d choose the Sig Mk25. I like how it feels, smooth trigger, and accurate. I prefer the SA/DA. Parts are readily such as additional magazine and rebuild kits. I find that it is a heavier pistol compared to the poly guns but as a result it absorbs a lot of the recoil making for quicker follow up shots. From the factory it just needs a nice surefire weapon light.
Full disclosure: I like my Sig firearms and it’s what I shoot the best with.
I’m not a fan of the Glock but again replacement parts, accessories, and magazines are cheap and readily available. Pull the trigger and it goes bang.
I’ve never shot a FNH or the CZ pistols but they look pretty sweet. I’d be worried about replacement parts availability and pricing.
I’ve shot the Beretta and I hated the feel, safety, and the exposed barrel most of all.
I wouldn’t touch the Cannik. Not my cup of tea.