New here, need help with lift

What up all. I'm looking into getting a lift to allow 33's. I've been looking into this a lot, but need more help.
I got a 2001 4x4 trd, mostly stock, except ride right air bags from the previous owner. I've seen a bunch of posts saying not to go above 2"... really? I've seen kits up to 3.5" without doing diff drops etc. What do you all recommend?
I'm looking at the fabteck 3.5" basic, maybe nitrogen if I spend twice as much.
I've been hearing a lot about Billstein 5100's + new coils. And of course ARB.
I would love to hear some feedback before I invest. Hook it up!

 

Also, does anyone know if my truck can have 15" rims? I've got a tire store saying yes, but a real 4x4 store saying no bueno... They say it's a brake clearance issue. Anyone agree, disagree?

 

For the 15s I believe you can as long as you check clearance wheelers offroad makes a nice set that's fairly cheap.
I had the fab tech basic suspension lift and it was super rough but the struts were blown out so I replaced them with 881s and 5100s very pleased with the combo