The question should really be "can I afford a 4" lift?" When going that tall will you be able to afford everything that comes with it, like new driveshafts, new brake lines, track bars, sway bar links, ball joints and so on and so on and so on.
Second question should be "why do I need a lift?" Are you taking it to Moab, the Rubicon trail, mudding, why do you need to lift it. If its for looks, then put a 6" lift, 40" tires and get a step stool, you will never flex it enough to break anything if it stays on the street, but you run over enough speed bumps, eventually something will break.
If you can afford it, I would recommend a MetalCloak lift and some Tom Woods driveshafts, some 37" tires on 17" wheels. Good luck making a decision.