Strider
Observer
I would go with the FJ simply because you like it more. You'll take it out more and enjoy it more than the Tacoma.... as long as you aren't worried about it breaking.
I'd suggest giving it a proper once over, new fluids everywhere and maybe a belt or two. New brakes, new tie rod ends, new seals, etc. Basically, treat it as an old FJ you just bought. Then build the rest up!
Now then... I have a quick question. What all issues have you had with your JK? I (knock on wood) haven't had any issues with our '16 JKUR, currently at 75k miles, and am curious what year yours is, mileage, etc.
Similarly, I LOVE driving our Jeep on tips but the 4Runner is realistically more comfortable and is still quite capable. Especially considering we travel like you with a lot of pavement and, unfortunately, only some dirt.
Sorry its taken so long to answer.
I am working on the FJC first. May as well since I already bought the ARB Bullbar and winch, and it already has an OME suspension.
As far as the Jeep JK: shredded tranny out of the blue. Vehicle is on road only, no off road. Death wobble, engine leaking water and oil from three places, door locks stopped working, heater doesn't work right, loose exhaust amnifold (even after fix), burns oil like crazy, and other issues. I had a friend who changed the oil all the time and his JK burned it up, engine seized, and dealer wouldn't honor warranty.
I will not but a new Jeep again. I do not believe they are well built or even remotely reliable.