What are the top 5 brands for 5W?

We kept our eyes open while camping. Take a drive through some local rv parks or state parks and if you see one you like, jot the name down. We found that the nicer more expensive top of the line units were never at the RV shows. The one we ended up with we had never seen before. The closest dealer for us that sold the unit was 250 miles away. We finally met a couple at Bryce National Park who had one and they gave us the tour and as a mechanical engineer, he told me why it was his choice. After looking at many,a year later we had one. Like I say, just keep your eyes open and search the internet. Like most on this forum, I am not a mechanical or structural engineer and don't get involved in brand wars. Best of luck in your search. We love every RV we have had.