Unless you are going to offroad and/or go with a larger tire than 35, I don't recommend a 4" lift.
2" front springs and add-a leaf (or 1 inch rear block), require almost no major concessions to the
rest of suspension and drivetrain, where 4 you start to get at the limits.
The rears are almost 1 inch higher than front stock, so the 2/1 deal levels that out. I've run 35 AT's.
(which are small 35's) for 20 odd years and they fit fine, even with extra weight of snow plow on front.
The only other mods you need with that setup are 'maybe" adj track bar to make it perfect (although I ran
without until just this year) and longer shocks (but only front is somewhat mandatory).
I like Superlift coils, but I haven't bought a new coil spring in well over 10 years. The progressive springs and
high number miltipack leaf spring setups ride the best. Again, for street, you want softer coils/leaves and
BIG sway bars front and rear.