I tried to keep my big mouth shut here, but it just ain't happening
I only run Cobra CB's, however I will be trying a Uniden PC 66 in my old 79 Chevy off-road truck next year.
I currently run a Cobra 25 Sound Tracker in the Dodge. Its had a lot of work done to it, and can talk really good distance's on clear days. I wouldn't advise purchasing a Sound Tracker equiped radio if you plan on having it modified though. After the first couple of mod's the system becomes worthless.
FJ40Charles was right about boosting it and adding "talk back. " Talk back gives you the ability to hear how you sound as your are transmitting. Thus, if you have a squeal because something is worng you can fix it.
As far as antenna's go... . if you want a magnent mount I would
strongly suggest a Wilson 1000. I currently run a Cobra High Gear off of my toolbox, but a lot of members are running a short fiberglass stick antenna on the fender-lip mount. Personally I don't like that (just my opinion), and don't think it would be real good for trying to talk over distances. Although I could be wrong.
If you can find a really good CB shop go in and ask about Peak & Tune, Power Mod, Super Mod, Bigger Final, and Connex Board. Those are just the begining of what my radio guy can do to your CBOo.