One thing to think about too with half doors is that they help keep stuff from falling out, prevent a decent amount of the stuff that gets flung up on the trail (mud, rocks, sand, water) from getting in the cab, and provides at least a little bit of a barrier between the rocks on the outside, and your bodies on the inside. I personally would not rock no doors on the trail.
thats what i was thinking when i did mine, i have plenty of door where the mud will be coming in, and plenty of room to poke my head out in the right spot