I'd say, in general, most people agree to the following "groups of quality" when it comes to Class C or similar coaches.
1) Coach House, Dynamax, Renegade (not really a C IMO)
2) Lazy Daze, Born Free, Leisure Travel Vans (Triple E)
3) Winnebago, Nexus, Phoenix Cruiser
4) The rest
That doesn't suggest that "the rest" are equal. They aren't. I'd encourage you to take all the time and money you need to travel around and spend time in various quality levels of coaches. You will start to determine for yourself exactly what you are looking at in terms of quality.