Given the perimeters of what you expect out of your rig you may have set the bar a little high. As you gain knowledge and experience you'll come to realize (like many here) that you'll need to make some compromises for a rig that is capable of doing challenging off-road trails (Rubicon) with a family of four, with camping gear and also as a reliable DD with on-road comfort and good MPG.
For example, my 1987 FJ60, Orig/maintained 2F/snorkeled, rebuilt carb w/smog gear, H55F, rebuilt frt/rr axles w/4.56's and ARB lockers, 33's, rebuilt T-case, re-done interior, heavy bumpers front/rear, sliders and stocked with RTT, off-roading gear and camping gear for a week will only get 10-12 mpg and tops out at about 70 mph. It's old school technology, not as comfy as an 80, but that's what I like and therefore I compromise accordingly to enjoy the my rig and trips. Even though it's a 6cyl gasser, I wouldn't hesitate driving anywhere in North America and it's very capable within what I designed it for. The 60 also has great after market support and parts availability. Mine wasn't built to run a trial like the Rubicon, but it has run a number of challenging Moab/Colorado trails without any problems and is very comfortable and reliable as a DD.
Good luck and enjoy the process of learning what will work for your type of wheeling!