Custom is the way I'm going to go. And every summer, when the hardtop comes off, I say I'll get one in. I've got friends with welders and friends with tube benders. One guy even has the steel.
I've seen so many different designs, angles and styles. I need practicality and not overly done. Steel is heavy, and too much weight (on top) or just on Jeep, isn't a good thing. But protection??? What's that worth?
Buying a cage is a great idea. Whether it's a custom or pre-built, look into angles and stress points. Find someone with lotsa lotsa knowledge and a little engineering. At least that's what I'm going to do. I'm going to have it built the way I want it, but someone elses brains.