For bling - wheels, and tires too if you want bigger than 35. 37 KO2s fit without any mods, provided wheel offset isn't extreme. They also make offroad just that little bit better for added ride height/clearance, and softening the hits.
For offroad - get a second spare wheel/tire, a jack that is usable relatively quickly offload, tools to get yourself out of a pinch, and a way to secure all that in the bed. Get something to lockout the alignment too. Simple/cheaper options include cam bolts, or you can fully lock the bottoms with plates/inserts and then adjust camber/caster with SVC UCAs. Beware though, the SVC UCAs require you to drill out the spindles to fit the larger bolt rather than the tapered one. If you drive offroad at night, good lights like Baja Designs XL80s on the A pillars (look into SDHQ brackets as they are purportedly stronger. The fog pocket lights are way less effective than lights up high, and XL or Onx6 optics are considerably better than squadrons even at comparable lumens. The behind grill onx6 option from BD is pretty sweet too, and you can also mount various lights to the bumper (I added a 30" onx6 bar as an example). Consider protecting the rear end from rock spray - especially the rear shocks as the plastic stock stuff gets destroyed real quick with any sort of aggressive driving in 4 wheel drive. SVC and Foutz make metal protectors. I just wrapped the plastic with rubber and secured with hose clamps. For more serious offroad, get the Fox Factory Race stuff when it comes out, or some guys run the 19-20 stuff from fox too. SDI e click is also an option, but its still pending.
For security - ravelco
For convenience - get a tonneau cover, which protects your stuff from the elements and offers a mild deterrent for thieves.
For financial advice, I'd look elsewhere than FRF ;o)