I voted 4, was tough between 4 and 5. I like the color on 4 but 99.999% of the time I would do the simple black with no background of 5. 4 looks almost like some kind of military unit patch for your shoulder.
Would be kind of cool to have some stickers to put under or over the top almost like Sgt stripes with the trail name in the stripe. You could have 2 stickers...one available online and one with the Granger name on it only available if you purchase at Granger.
I have a pet peeve about dealer tags. It's one of the first things I asked my local dealer when they contacted me about my reservation: "Can you confirm that there will be no dealer tag on it?"
I can understand a dealer tag if I am leasing a vehicle but not if I'm purchasing. The only exception is if my local dealer comes up with great pricing like Granger is offering... with that it's almost like being part of an exclusive club. I'd still want something on the small side and not permanent.