I have a 2.5" body lift. You can order up to a 3" from 4Crawler by asking them for extended pricing.
Toyota 4Runner/Hilux Surf Body Lift Kit Pricing/Ordering Page
I would spend the extra money, very minimal, and get the stronger hardware and larger blocks. I would also ask them for black because you will be able to see them with anything over 1.5". The kit includes a drop bracket for the radiator and a spacer for the steering shaft. The body lift is stupid simple to install, radiator spacer is a little pain, steering shaft spacer will have you cussing for hours! Other than that you don't have to worry about anything but moving your bumper covers. For the front if you pull the front bumper cover off, super easy, then you unbolt the 3 bolts on each side of the bumper support and move them up a bolt or two depending on how much lift you get. For the rear, well if you go above 1.5" you will have to trim the bottom of the bumper cover so it can go over the inner bumper support. This makes it so you can see a little bit of it so I would pull the cover off, clean up the metal and paint it nice and black again.
Other than the steering spacer it was very quick and simple. Follow the directions and you can do it by yourself on a weekend day.
If for some reason you want to go with a 3" you will need to find where your gas tank wiring runs from inside the body down to the tank because with 2.5" I have my wire stretched right out and I need to get in there and see if I can push some slack in there.
Don't worry about the naysayers. Do it right, torque everything down then recheck it after a week of driving and it will be fine. I've had mine on for a year and flogged it often and have zero issues! The body mounts are very hardy on our rigs not like old Chevy's.
Edit: Oh, and with a body gap you can clean dirt and mud out easier!! I love it!