Replying to Lets talk coping

Allright so im presently in the process of building myself a new battel ship box for my back yard setup, and im stuck in a construction crossroads. I can either build the box without coping, give my edges a little bit of a break for the ushuall wear and tear, or i could make a super legit box complete with coping.
So heres what iv seen/used befor
steel piping- basicly iv used it on large all steel boxs befor for a mountian, im looking for info on how to make it work for a wood, backyard setup
argle iron- iv seen some of you guys using it on your boxs in the post your set-up thread, what guage/ thickness of the angle iron did you use? How well does it work?

Thanks for the help guys