I looked at both hot springs, caldera, artesian and marquis. I found both the artesian and the marquis were much less about 3 to 5k less than comparable hot springs or caldera i was down to the 850,860 or vector 21 94l. Was 6 weeks to get an artesian so I just bought the 94l but I liked the artesians just as well . Look at the 860b has 3 pumps is a real powerhouse.