Barf john. Barf.
Black betty, I like the cut of your jib.
If you can get a rubi lj for a good deal and its fairly built then go for it.
You can always sell it if you lose interest.
It will take a while to start breaking it. By then you will either want out or you will want to keep going.
Any wrangler is an easier platform to work off of anyways. Also due to balanced suspension wranglers typically work better then xj,s.
Until both are relly modded, then its either or.
Good luck.