In reply to:

...decent advertising campaign (never seen it advertised), ...



I have seen it advertised on the back cover of a magazine here in the UK. I can't remember which mag it was now but I did see it in more than one issue. It was also being advertised as the Empeg Car Player even after it had become the Rio Car.
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Marcus 32 gig MKII (various colours) & 30gig MKIIa