Newer or older??

Hello, Looking at picking up a used Jeep. Of course, pricing is all over the place. Any advice as to which year/model you recommend? Looked at a few Rubicon‘s, and 04 in excellent condition, and 06, and a 15, and an 85 CJ7, all of which are close to the same price give or take a couple grand.
there are also a couple of 2015 sports and Sahara’s in the same price range.
Basically, if there is a choice of an 04, 06, 15 or 17 Rubicon, in similar condition and options is there a particular year you prefer?
I’ve heard some say the early 2000s are built better with better engines as opposed to the newer ones???
Your thoughts, please
Thank you

 

https://www.jeeps.net/threads/what-jeep-would-you-buy.7194/

 

https://www.jk-forum.com/how-tos/slideshows/8-best-years-for-the-jeep-wrangler-990319