The revolver everyone should have at least one of:
4" DA 357 with adjustable sights.
S&W, Ruger, Taurus, Colt, whatever. My current one is a pinned and recessed S&W model 19. Shoot 38 "cowboy loads" up to full house 357.
If you want a revolver in 45 ACP to go with your auto, S&W 625. I've been
having fun with mine this year shooting USPSA Revolver division.