I vote Coachnet because they do more than send you a wrecker. Their tech support line is great.
I called when we had a power converter/charger failure in our Bounder, about a day from home. They gave me the name/phone# of a nearby RV service firm and also name/location of an RV parts dealer about 15 min away, if I wanted to handle repair. Coachnet even checked to confirm part was available. 90 min later I had part installed to continue our vacation.