CB Help

Need some help please. I drive a 2015 Cascadia. I have a Uniden Bearcat 880 CB that I recently had peaked and tuned and supposedly boosted. I'm beginning to think I got ripped on that deal, but it's done and nothing I can do about it now. Anyway, my reception sucks (and I'm not too sure I'm getting out too good either). Yesterday I was beside a dump truck and could see the driver in the mirror on the radio and all I could hear was broken and staticky.

Ok, so I know the antenna system in these trucks are pitiful, especially considering there is no external antennas on it. So I'm looking at getting the bird perch bracket, an 18 foot cable and an antenna. To be more specific, I was looking at the Wilson cable and possibly the Wilson 2000 antenna. I'm not expecting a miracle fix to my problem, but would these help? I don't want to throw money away, but I want to be able to use my radio. Sometimes it works fine, others not so much. I'm getting tired of hearing half a conversation between two trucks right beside me.

 

The problems are consistent with before the work on the radio. Meaning, I was having similar problems before I had the radio messed with. In fact, this is actually the second radio and I've had the same problems with the old radio as well as different trucks. I should mention I am a company driver so modifying the truck in any way is out of the question.

 

So, going back to my original question, which is buried in my original post. Lol. Is the Wilson 2000 antenna and the Wilson 18 foot cable a good option to my problem? And from what I was just reading, do I really need an 18 foot cable? Is there anything shorter that is available? I had planned to purchase these items and install them, but before I connect to the radio I would go to a radio shop and get it set up right.