Perhaps my favorite centerfire auotloader is a my KP95DC. It's stone cold reliable. I don't shoot it as well as I shoot my G19 or my S&W 5906TSW, but it feels better in my hand.
I've got a very nice MKII Government model that has a 6&7/8th" bull barrel. I have a HiViz front sight on it with a good many Volquartzen internals. My 4" bull 22/45 is set up the same way.