My wife and I are planning to start a family in a year or two, and talked about the same dilemma. We had a 2004 fifth wheel, and wanted something with another slide and maybe slightly longer because we have company over often. I wanted to upgrade to get top dollar for my unit now, and make the switch before we have a child. It took some time for her to get on board, but she came around and we ended up buying new. Dealer put together some great numbers last fall, ended up trading, should have the new unit paid off in 2 years. We got what we wanted and have no regrets. If you want to upgrade and can do so comfortably financially, go for it. As for buying an older unit, it's all personal preference. I bought new because I wanted something I could keep for many years and still have some decent value at the end. It's all in what you want to do. Good luck and congratulations!