Liking your choice and, above all, being able to shoot it well, are the qualities that make one's choice the best for them.
Mine is the SIG 220 Combat. Built with internal coatings to resist corrosion, proven as reliable as anything out there, and even useful as a club, are why. But, above all, I shoot it under combat conditions better than any other I've shot.
If I really need a lighter gun, or one that holds lots of ammo, then it would be the 5.7 FN. E