+1 for the StarCom. I have the newer version (the advance?) and it works great. I never used the phone function or the intercom function but primarily as a method to listen to tunes while on trips on my ST1300. I ponied up for the remote volume control which sold the unit for me over the Autocom unit. It worked great with my mp3 player and my XM unit. I wasn't overly impressed with the CB function with my Cobra handheld unit.
Have you considered purchasing a J&M CB radio that has the intercom and aux input for mp3 etc.? It might be more cost effective, and that's what I ended up replacing my Starcom with. I installed it on my Road Glide recently and I think it works great. Adn don't sell the whole RC controlled look of the antenna short. Chicks really dig it!
Just a thought.