I like having mine up on the roof but thats what I am used to from driving the big rigs.
Same here, Cobra 29LTD Classic mounted over-head, dead-center width-wise, and as close to the windshield as it can go.
A panel of toggle-switches occupies the space above the C.B.; and, two different interior-lights are mounted underneath, a very bright dome-light and a twin aim-able light like those found over air-liner or Greyhound seats.
Oh, and there is also a clock and a digital thermometer, and some other stuff that I am probably forgetting.
The external speaker is mounted to the left-rear corner of the cab, right beside my
ear, so I don't miss anything.
The antennae is mounted on the left-side mirror.
One P.A. horn-speaker is mounted right behind the front bumper; I have the wires/plugs routed for three more, one each side of the head-rack and one at the very rear; I just haven't taken time to mount those three speakers.
I would miss my C.B. for certain if I had to do without it for a trip.
I had one konk-out in the middle of a conversation one night ( not a Cobra --- I knew better
), while following the truck that knew where we were going.
I got his attention and we stopped at the next truck-stop; ten minutes and a shiny new Cobra and we were once again on our merry way.