the previous owner of 5, yes five Langs - and two Ole Hickorys, I vote for Ole Hickory.
Wood is cheap, but do you want to get up at 1am and start splitting wood, light a fire and keep it burning all night? Fun the first time - well, not really.
With the Ole Hickory - or any wood/charcoal/gas back up machine, you'll get your life back.
In regards to the silly (IMHO) comment someone made about being an oven ---- it is all an oven. If you are using wood, it will give it a nice wood flavor. But moisture is the key - and having a life. For me the OHP is the only way to roll. and we cater a bunch - can't do it with a stick burner - and not burn you out. :-)