Crissaegrim,

I own a Tivoli Model Three which is similar to the Model One and have the matching external speaker for stereo sound. Not sure which speaker manufacturer could exactly duplicate the full range 3.5" driver sound in the Tivoli but you may want to try one of the small satellite/bass module systems by Cambridge Soundworks. To my ears, they seem to have a similar sound and the Tivoli is somewhat designed by the same principles. Small satellite speakers connected to a bass module. Not sure if the demo you heard also had the Tivoli bass module connected. Good luck with your selections.