The 400p looks perfect...my main hope with some of these portables would be that I could possibly plug in the wall at home for other things without having to fire up the truck. But not a deal breaker.
I use a dewalt DXAEJ14... Has auto fill and does gret on my 33s....its a nice accessory to keep in the truck.It also has 1400/700 amp jump starter.What air compressor is everyone using to reinflate tires after off road adventures?