You want the ARB (if you can afford it). The Detroit could put you in a ditch (or worse) on those snow-covered mountainous roads. The open rear will help you stay on the road. If you get stuck, just push the little button. This would be my first choice but I'm poor right now. The only drawback to the ARB is more likelyhood of failure (compressor or seals) but this is usually due to operator installation or neglect.
