Your trailer tongue weight? Is that the factory weight, or does that weight include battery and 2 - 30 pound propane tanks. The battery and 2 - 30 pound propane tanks will increase the tongue weight significantly.
I think the 1000 pound system would be a better fit. Is this your first camper? If so, maybe the dealer is thinking in 2-3 years you'll be getting a different tow vehicle and a different trailer, and you will then have to get a heftier weight distribution system. Buy now, save having to by again in 3 years.
