With two children, you may wish you looked at the 21'. No appreciable difference in weight. We have owned a 189FBS for two full season now. We are quite satisfied, particularly with towability (Chevy Trailblazer). Our only regret is that we did not go slightly larger. I suspect with two children, the 189 can quickly become tight quarters. A larger bathroom and walkaround queen would also be very desirable to us. It is well to remember once you sign on the dotted, the trailer is yours. There is no going back. Comments about PDI (Pre Delivery Inspection) are well taken. Many of them are inadequately done, and the new owner is left to pick up the flaws. Then it is the inconvenient march back and forth to the dealer to get done what should have been done initially. Insist on a thorough PDI, whatever you buy.