There was a write-up for a Sharp unit in Stereophile recently. It got high marks and was very portable. I've used my Logitech Squeezebox Radio for motorcycle trips and it worked out great. It has the added feature of wifi internet radio if you find yourself in a 'hot spot'. The Radio has only one speaker but very good fidelity for the size and it has a remote and battery power (plays for about 6 hours on battery) available.
