tem3000
Check-out the KZ line of 5th wheels, they are well built an the price point is darn good for a new trailer, I believe you get more bang for your buck, less what I call bing an more functionality an great customer support ...
As the OP stated there are camp grounds that will not take trailers over 10 years old, we had a Coachmen Chappy that was over 10 yearn an people didn't believe it was that old but looked new because we kept it up ... We only had one camp ground that ask about age an after looking at our Chappy they couldn't believe it an stated that they wished everyone would keep their trailer in that good of shape ...
I am of the mind that if you get the right deal you can buy a new trailer of good quality for the same price as one of the high end trailers an have just as good as a trailer that is used but high end ...
I know owners lover their brands an it like buying a Ford, Chevy or Dodge, you just have to cut thought the BS factor an choose the brand that suits you .... As well the most an I can't say it enough !!!!!!!!! is the dealer you buy your trailer from, bad dealer, bad service an owners start to complain the trailer is bad as well when it's not .... Good dealer an service owners will rave about how good the brand of trailer it is :)
Good luck an safe travels :)
Chuck