The GPs that looks and works well if you are building a show vehicle would be the Kenwood DNX7120. It is indash and uses the Garmin GPS system, you can download trail maps and has the ability to do XM or sarius, also can do DVDs, CD, stereo but they cost 800.00
I went with the Garmin Nuvi 760, $378.00 at best buy, they matched the Walmart online price. It has bluetooth, and SD card slot for offorad maps..
Tires I did 33 BFGs AT Kos they really fit well with the vehicle and work well at moab but a tire with better lugs might be a better call and look cooler, check out the Mickey Thompsons they have a popular tire.
The ARB upfront with a winch is my favorite call, if you don't have that yet.
Only thing with Gobi, can't open window.
I went with AllPro skids, they are really nice folks there...I also like the Rasta skids very nice looking.
Metal tech makes a great rear bumper as does all pro.
Camping lab awning is a must with camping lab RTT.
I am not as well versed on wheels as everyone else.
Make sure you go with 16" wheels vs teh 17s, looks like you have 17s
16s will allow you to get a bigger rubber side wall, better for off road and will get you more rubber to spray armor all on for the show..
My two cents..
Here is mine and Hermit's green machine

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Chris, Denver Colorado
2008 Sandstorm w/ProComp 3", ARB front, Warn M8000, Winchline 80' Blue Syn, Maxxis Bighorns 315/75/16, 33" BFG ATs, TRD Gun metal rims, Light Racing UCAs, OEM sliders, All Pro Skids, ICOM IC-V8000, Cobra 75 with Bandi mount, Edge Star 43QT fridge, Camping Lab awning, BajaRack full and FJ expo roof racks, Safari Snorkel, Camping Lab RTT
TLCA #18518
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Off-Road/build PICS
http://www.ChrisSandstormfj.smugmug.com