A:
The Bose Companion 5 system is intended for stationary desktop use and would probably not function well for your particular needs. The system is not portable and a microphone cannot be attached in such a way that would allow you to speak over the music. The sound it will produce is also designed for near-field personal listening with computer games and movies and not for presentation to an audience.
For this type of mobile pro application, we might point you towards our L1 Compact system. This product is not sold through Best Buy but can be found here: http://bit.ly/Kmg5Xa It features easy set-up and storage for portable use and features both line and microphone inputs to let you present from a computer and microphone. More importantly, this type of system is designed to be used in music presentation/performance.
We hope this helps!