My 2 cents on what I would buy...
I would go with the Plum ZJ... if I had to pick between the two listed. No comparison here between the two when you consider all the extra mods/components on the plum colored one.
On another not I have owned a lot of off road trucks, including many different brands and most of the models used on the trail today. For a weekend warrior and family rig the XJ's and ZJ's are wonderful trucks. Creature comforts/cush ride/lots-o-flex/power/and tons of mods/parts and tech articles out there ready for you to customize it more for your needs or just keep it in good working order.
Every truck will have its up's and downs especially a used rig, but you have to do some PM work to all offroad trucks in order to keep em gonig (I had some issues with my grand too, but worked thru them and loved the truck)
Also, sometimes you can just live without the stock horn...lol
So the small things needed for the plum colored is not bad at all. If ya got the money to snatch it up then its a great deal in my opinion. I think your family would love it over more cumbersum SUV's that need work and/or extra mods to get out on some decent trails.
Only additional thing on my mind would be to replace the front spool with a selectable locker to help reduce the wear and tear on the drivetrain and also save your arms on a long weekend.