Wassup Man.. Welcome to the Forum
Yeah I've got a 05 Crewcab Black/ Charcoal leather with 5.3 and 3:73, and I put Bel-tech 2in. lowering Shackles and it set the truck perfectly level. IF you want to go lower I would go with a 2/4 drop from Bel-Tech thats what i have on my red truck and I like it to for that mean conservatine low look. And far as grills my buddy just bought one off of ebay brand new billit grill (over lay) still in the box for $45 might save you some money.
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.