Welcome!!!!
You definitely can't go wrong in getting everything on your list of goodies you have there, but as mentioned above, the exhaust and short throw shifter are more aesthetically pleasing than anything...They don't offer much performance gain, but for some, it's all about the short throw feel and grumbling notes
If you don't plan on modding your rig too much, but want a bit more off-road capability, I'd highly recommend getting the OF (off-road package) added...It will give you much better tires than the stock Dunlops right out of the box, and a better suspension as well...I'm a light weekend warrior off-roader myself, and the OF package has handled everything I can throw at it
Best of luck in your purchase, and God bless you and your brothers and sisters in arms out there...Get home safe so you can start getting that shiny new FJ dirty
DAN