150 feet? It sounds like your SWR may be off.. it should be a lot better than that. Like Uncle B said the Cobra 75 is a pretty nice CB, but more of your performance difference is going to be in your install and antenna.
What's the name of that CB shop again? there's a place that will test it for you, then help you make adjustments, etc. They'll also sell you what it takes to reach optimum quality.
99 uzj100, gx470
05 525EXC, 01 XT225, 07 TTR90, 07 CRF50