I don't care much for CB anymore. When I run CB, I use a Wilson 5000 mag mount. I riveted a small steel plate on the center of my rack. If that space is taken, I'll stick the mag mount on top of my camping webber grill. It works great. Plus it gives me a lot of height. The coverage is great. However, more and more I find myself using just my Ham rig and no taking the CB antenna all together. Our group has almost gone 100% 2m.
As for the 2m setup. I have Comet's heavy duty K400C and a short SBB1 rubber ducky antenna for every day use (parking in my garage) and tight trails. For desert trips I have a much longer antenna (better gain). I'm not at home right now. When I get back I can post the model number.
Here's a post on my blog on my Ham radio antenna install