Steinkunde,
Most ARB bumpers include an antennae mounting tab on the front (had one on the old Cherokee and loved it). This is a Smithybuilt and I installed in the same location (btw their quality has improved considerably in the last few years!). No visibility or range (distance) issues at all.
Geek,
I just use two U bolts and a few zip ties. Nuts for the U bolts are inside the wheel. To steal them you have to open the door or use a bolt cutter. It hides the brake light but not much of an issue in these parts, not to mention that both of my off road trailers obscure it as well when hitched up.
Cheers.