I own a Viair 400-RV. Make sure to buy the RV version. It comes with 2 coiled hoses and an auto-shut-off. So once it gets about 150 or 200 psi in the lines (I can't remember) it shuts off. No need to run back and forth turning the thing on and off to check tire pressure and keep airing it up. It will get a 275/65R20 tire up to 50psi from 10psi in about 2 minutes. It has a 33% duty cycle, so that means it can run for 15 minutes continuous before needing 20 minutes to "Rest" in 70 degree weather.
The non RV version doesn't have the auto shut-off, so you have to keep running back and forth to the compressor to turn it off to check air pressure. Only faster air compressor is a smitty built unit made for off-roaders, but it doesn't have the auto-shut off feature either.