I'm running 38s on 6.5 and it's a bit high but works for now. I plan on redoing the rear fender wells and then it'll go down to about 4.5-5".

 

I have 36's on 6.5, but I wil be dropping it back down to 4.5's. I am running full widths with 4" BS rims. ALso have a custom flat skid which is why going lower is really going to work for me

 

Right now I'm way too high for my likings but my plans (when the one tons go in) is to go down to around 4" of lift on 37's. I'm running with an MJ though so I can cut a lot more in back without issues and I'm also running a custom built 3-link front which is tucked up so nothing hangs down below the frame rails.

It all comes down to how much you have hanging below the rails and what you plan on doing with it.