Is there any point in lifting the body other than giving you extra tyre clearance?

Im planning on running 35s eventually, so was thinking of installing a 2+2 lift, ive been told with the right offset rim it wont scrub or much, but that still leaves the chassis and everything bar the diffs 2" lower.

Soo, now im thinking save up for a 4" suspension lift and if i need/want more tyre clearance, bolt a body lift in?

And....What are the real, down to the bone, true facts about certain suspension/shock brands??
I dont want to spend thousands upon thousands but im also not installing King Springs.

Cheers everyone