Welcome to the forum! There are many good forum members willing to share their vast RVing knowledge with everyone!
Your question will get many answers as there are dozens of fifth wheel manufacturers. When my wife and I were upgrading from a 30 foot travel trailer to something larger five years ago, the Grand Design Solitude 380FL had the favorite floor plan and amenities. After adding the cost of the fifth wheel plus cost of a 3/4 ton or one ton truck to tow it and getting advice from LSU RV tailgating friends, we opted for a diesel pusher motorhome over a fifth wheel. However, had we decided to go the fifth wheel route, the Grand Design Solitude 380FL would have been our choice --> https://www.granddesignrv.com/showro...oorplans/380FL
Your thinking on new vs. gently used is spot on! There are often very nice 2-3 year old fifth wheels available at consignment dealers such as PPL Motorhomes in Houston --> https://www.pplmotorhomes.com
The price for a 2-3 year old model is thousands less than the price for a new model.
PPL currently has a 2018 Grand Design Solitude for reasonable price --> https://www.pplmotorhomes.com/used-r...itude_rv-43826
Also, the first quarter each year is typically "RV Show" season. I encourage you to attend a large RV show, walk through the fifth wheels on display, find / touch / feel the one you like the best, then do your shopping. For example, Houston's annual RV show is February 12 - 16, 2020 --> Houston RV Show at NRG Center - Houston, Texas - Held in February
Good luck in your pursuit of a new-to-you fifth wheel! Let the forum know which fifth wheel you purchase!