I'd say another 4Runner...... but you may want to look into a Highlander!
The new 2014+ Highlander are very nice, get the AWD XLE..... the interior is all leather, all up-to-date "high tech features", and you are paying with Toyota price to get the Lexus experience! Everything a BMW and Benz has.
I had a 3rd gen 2WD 4Runner (18yrs old now, still running strong, 270k ODO), and then I had a BMW X5 (the past 5 yrs), and I *almost* went that route to get a Highlander (getting rid of the X5)...... so close that I had already put down deposit for one.... then, I ended up with a new 2015 5th gen 4x4 4Runner (just a few days ago)..... cuz I think I actually want to start offroading/wheeling/camping etc...