I was wondering about dual antennas. I just installed a CB in my 91' FSB and went with dual Firestiks from radio shack. (One of the few that actually sells radio equipment!) I have them mounted on some slightly modified gutter mounts. I'm currently getting an SWR meter reading of 1.4, but I think I can improve that with some better insulating between the mounts and the antenna. Unless someone else has a better idea? I've also considered going with bolt on side ball mounts with springs, but I'm very hesitant about drilling into the skin. I guess I could go with springs with the mounts I have right now, but my antennas are already too tall to clear some city obstacles as is, like drive through. I cringe every time I hit something with them. (Nominal clearance is at 9 ft. around here, and my setup tops out at 9' 2".)
I went with CB because there are still lots of farmers and companies back home that still use them. Mostly in their own trucks and tractors and many of them are family that I could be called in to help on occasion or call for help if needed. Not to mention convoys and hunting/camping adventures. Sure, I carry a smart phone, but there are some places still that don't get reception.
For as little as we use it, CB works fine. Now if you need a dedicated communications system, something more elaborate would work. But they still have their drawbacks. We have dedication 2M radios for airfield communications and even on a relatively flat airfield, we still have deadzones that can't be reached. Yes, they are clearer, but IMO, that's about the only improvement worth noting. Its like comparing a simple flip phone to a smart phone. Sure, you can do more with a smart phone, but if all you want to do is make a call, the flip phone does just fine.