That's kinda like asking someone what shoes you should get.....each will have their own favorites based on their needs or likes. I have and have had several CJs and FOR ME only, hands down the 82 to 86 CJ-7s are the best. In stock form,the 258, 5 speed , hardtop, and AC make it the most refined of the CJs. I have a 75 CJ-6 and it just drives and acts sooooo different than the later ones. Comparing stock that is.Of course lifts, big tires,etc will change things.
1975 CJ-6 304 T15 Dana20 30/44 3.73
1983 CJ-8 258 T5 300 30/44 3.31 Looking for full or half hardtop buy or trade
1986 CJ-7 Laredo 4.6 stroker T5 300 30/44 3.31
1986 TJ-7 Trail Jeep project in the works
2003 Inca Gold TJ Rubicon