Hey man I would go with the 2/4 drop first than if you don't like it go lower. but the things you named off would work very well. I run 2/4 bel-tech with coils on front and shackles and leaf springs on back with toxic shocks and c-notched frame and my truck rides very good and looks really good going down the road and don't scrub to bad.
2002 Red Chevy RCSS (engine mods)- 05 5.3L, Procharger P-1SC 9lb.pulley, 80mm BBK TB, TB By-Pass, 38lb. Inj., AlkyControl Meth Kit, ASM L/T's, Magnaflow X-pipe, Borla's, FLT Level 5 4L65e, PI 3000 Stall, B&M Tranny Cooler, 3:73's, G-80, E-Fans, 160' Thermo. Custom Built Intake with K&N. WideBand 02 Sensor, DIXIE TUNED.