Hi Tom. You have a very similar hilux set up to mine with the canopy on the back tray.
I am currently running Iron Man (came with the vehicle), but am not too happy with them. I have already snapped the lower bar of the front right shocker. I must say though that their new shockers that came out a month or so ago look a lot beifier. As Sam said, stick with a 2 inch. It will get you through most tracks just fine and wont cause dramas with your insurance so long as you let them know. I am about to upgrade the whole package to Tough Tog 45mm adjustables. Cant give you any feedback, as it will be another month before they are installed. Do do the full Tough Dog kit included extended brake lines and drop kit to re-correct the diff you are looking at around $2500 + fitting.
One other thing to consider, I do remember seeing a post that said something about some of the modern hiluxes not being able to be lifted. Not sure what it was about and I had not heard of this before so it may pay to start ringing around places lkie Opposite lock or ARB.