Welcome to the forums! If you post down in the JK specific forums, I am sure folks will give you a bazillion ideas. "Custom" goes with "Jeep" sort of like peanut butter goes with jelly lol! I would suggest starting with things that make most sense based on how you plan to use the Jeep or even just look you want to achieve. Ie not much point in beefy mud tires if you will never take it offroad in real mud - that kind of thing.
2014 JKR Granite Crystal, 5.13 Auto: RK X Factor 2.5 Inch Lift, Artec Front and Rear Truss, Artec Rear LCA Mounts/Skids, Poison Spyder HD Crossmember, Rock Hard Gas/TC/Evap/Oil Skids, Rough Country Diff Sliders, Nitto Trail Grapplers 37x12.5x17, Pro Comp 97 Series Wheels, Synergy Weld On Rear Trackbar Bracket, PSC Hydroassist, T6 Aluminum Tie Rod, G2 Gold Chromoly Axle Shaft/RCV front axle shaft, Dynatrac Ball Joints, 1310 driveshafts, Artec Rear Upper CA Mounts, Warn VR8000.