I don't really have a standout either but your idea of running a similar platform is a good idea.I’m thinking about focusing on getting as good as I can with a single gun as well this year. I’ve been cycling through several to see if there’s a standout before I choose what to focus on though. Nothing really stands out just yet.
The P229 platform makes a lot of sense for me in that I can run the same pistol as a 9mm with irons, 9mm red dot, .357 Sig with irons and .40 with irons. Another contender is the P10C.
If I run my Shield exclusively, I could probably do pretty well in BUG matches.