I like ViAir, and run the 450C. It's a great compressor and has no problem airing my 19.5's up to 94 psi rather quickly (where the pressure switch cuts out).
I highly suggest going a size bigger than you think you need and hard mounting it. You can mount it in the camper or TV, but then it's never forgotten, out of the way, and easy to use. Mine is mounted inside my tool box and with 2 25' sections of coiled hose I can reach any axle on the TV or TT.
I don't recommend installing a tank, they make the first little bit faster and then the entire operation slows down as you are filling a tire and a tank at the same time.