Gary: Heard the Bose. Held off on getting. Glad I did. The Model II looks much more easy to transport with the lighter base. I hope they or someone comes out with a single case for the Base module and the L1 base. For now I am still using the Logitech 5500. However, as you had suggested, I did replace the center channel with a much beefer speaker. The result is a much improved mid-range.
Mike: I don't think you give up anything. Most of the base on the Model I was for balance.