I have a Suzuki 650 Burgman that I wanted to put a stereo in. Although putting stereo's on bike's is not their speciality, they were able to put one on for me with an amplifier. It sounds great going 75 on the freeway. It is loud and clear and keep in mind that there is nothing on the bike to enclose the sound of the music like there is in a car.
Pros: high quality, good for there warranty
Cons: little bit pricy for bike stereo, but worth it
more