I too would highly recommend the Progressive. The one I had just died 2 months ago and they replaced it free of charge. If I was you, I?d get the 50 amp. That way, if you up grade to a bigger RV and it?s 50 amp, you?ll be already be set up. Also you?ll be able to always use the 50 amp outlet at the campgrounds and all you?ll need is a 50 to 30 amp adapter. Progressive also sells them. They are pricey but they are really heavy duty. I keep on hand a 50 to 30 and a 30 to 50 which will cover any situation I may encounter.