I had the bell tech 2/4, never rubbed in front occasional bottomed out in rear but only when loaded.
Replacement with inez 4/6. Have had lots of challenges with front tire rubbing inner fenders. Have finally gotten most of the issue dealt with and only rub on big bumps at higher speed.
Back does require modification of rear axle. Which would be difficult to un do unless you get the no cut brackets, which are no longer sold new.
The brackets definitely work and fix ride and the way the suspension responds. They are not required, supposedly for a 4 inch drop but I would still recommend them.
In my opinion a 2/4 or a 3/5 is best If you actually drive the truck every day, but do expect some compromising issues with bad road conditions..
Buy good shocks and be prepared for an occasional issue.
In my opinion get the bell tech 2/4, a set of maxtrax camber correction upper control arms and if necessary,, the rear inez brackets.