I am looking to purchase one of the above models, and am mainly interested in speaker audio quality, as my planned usage involves mostly listening to music. What are the differences in the drivers (if any) of the 20S/SMH10/SMH5? I remember reading that the SMH5 has smaller drivers and has a speaker upgrade accessory, essentially giving it the speakers of the SMH10, is this correct? Are the 20S speakers the same as the ones on the SMH10?
Thanks in advance,