Damn, your Tacoma is gorgeous [emoji1362]
First of all-
...panhard arm drop, all that stuff: Not needed.
I have to
strongly disagree. Anyone who has gotten the Panhard Correction Kit from [MENTION=28464]eimkeith[/MENTION] will tell you it makes a WORLD of difference in how your 4Runner behaves. Aside from raising the roll center(in most cases), having the panhard parallel eliminates the weird "waggy" rear end behavior you'll get.
To give a solid suggestion, I'd want to know what kind of weight you'll be having in your 4Runner.
Personally, I LOVE my ToyTec Superflex coils. They handle the weight I put in my rig great, and also ride great. A few members here will tell you they won't handle weight for crap, but I believe they all have rear armor bumpers and spares hangin off the back...and then add gear/cargo weight on top of that. That's a ton of added weight. If you plan on that, they won't be adequate- but neither will the SS 1.2 rear coils either(7 wrap LC80 front coils).
I have 200+lbs of dogs, and 200lbs or so of gear in the back whenever we go on any trips. With the progressive rate design, they ride great loaded or unloaded, and aren't too soft when loaded. Of course, shocks play a major role in that too. I had FJ 5100, and they were mostly great, but a little soft for me, so I tried some Tokico black shocks from a '15 4Runner. No bueno at all. Too stiff when unloaded for me. I'll even say harsh. I used to love bombing speed bumps, and having my suspension just soak em up(with the 5100). With the Tokico, bombing speed bumps is not fun, and very harsh. The 5100 are cheap shocks, and I would definitely get KING if they were within reach for me.
I just installed ToyTec's 3" coil on my buddy's rig, and they also ride awesome(I put FJ 5100 on the rear). I used 4Runner 5100 on the bottom perch with OME 2881 up front. The combo feels perfectly balanced, and rides great.
With that said, that's about as budget as you can get- without going spacers or Rough Country.
Like I said earlier- if it were in my budget, I would be on KING front and rear. Without going KING, I'm super happy with the ride of the 5100/OME and 5100/ToyTec with [MENTION=28464]eimkeith[/MENTION]'s brackets.
But again- the weight you intend to carry makes a significant impact.