2002 4x4 SR5 double cab Build advice needed

Hello everyone, This is my first Tacoma build and I'm super excited about it!!

I have been using a 2002 SR5 double cab 4x4 as my daily driver for about a year now, When I purchased this truck it had 170,000 miles, now it has 185,000 and change.
I know nothing of how the 1st owner drove and maintained the truck, but the second owner is a mechanic and Toyota truck fanatic, he took meticulous care of this truck and it shows!
I am the 3rd owner and as long as I'm alive there will not be a 4th.

Everything is in good working order, the body and interior are PERFECT and only has 1 small scratch on the hood that will probably buff out.

Current mechanical upgrades; New Bilstein heavy duty shocks and struts
2" front "above strut mounted" T6 aircraft aluminum spacer lift
1.5" rear "add a leaf" lift
Differential drop kit
Skid plate drop kit
Brush guard powder coated black

Aesthetic upgrades; All badges removed
ALL chrome removed, or painted matte black
Aluminum wheels powder coated black

Future upgrades; 32" AT tires
Differential locker
Coil over mid travel strut lift
Exhaust system, Headers
Supercharger (maybe)
Light bars
Rock sliders
Plate bumper w/ winch
Rear tube bumper with rock guards
Cruise control
Replace automatic trans for a standard

My plan is to drive this truck beyond 1,000,000 miles. I want to replace any parts before they fail, but I don't know where to start.

One of the 1st things is the mid travel coil over lift struts.
I've found a lot of options for these with prices ranging from $500 to $1,600 per pair.
I've read a lot of threads where people are using Bilstein 5100 adjustable but I've also heard they are bad about leaking.
I don't mind paying upwards of $700 (ex:FOX 2.0) for a PAIR if they're going to provide an excellent, long lasting ride quality.

What is the very best coil over 2-3" adjustable strut assembly for less than $800 pair, best for $500 pair? how much of a quality difference between the price ranges?

Also, what mechanical or electrical systems should I replace next?

This truck will spend 80% of its life on pavement but I also drive down a torn up dirt and rock road several times a week, so I need to upgrade my off road capabilities.

Any GOOD advice would be very appreciated.

Thanks.

 

Pictures please!

 

Roger that, as soon as i get back in town I'm on it!