I can't remember which Otterbox, but a couple people I know whom had theirs, ended up switching to Lifeproof because of how bulky their Otterbox were. my brother is a long-time Otterbox user but finally "noticed" how unappealing they look on such attractive phones these days, and so he switched to Incipio's mil-spec cases. Also, look into RhinoShield.
have a gander through the case thread as well to see what catches your attention.
Go with Spigen cases. I have their Slim armor. I've seen the Tough Armor on other phones and they look great. If you're not going under water with the case then go with Spigen.