I have only a nice 12V compressor which I carry in my truck. It pumps tires up and will blow out water lines satisfactorily in my 5er. Like member 49 34 in a previous post, mine has the auto shut-off feature where you set the desired pressure and then just leave it while you do something else. I sometimes want a 120V pancake style, but I don't see a huge benefit plus I have storage space limitations. If you only get a 12V compressor, I would recommend getting a robust model.
2011 Sabre Silhouette 260BHS
2006 F-250 6.OL