I was on the verge of buying a DAB receiver for the house (not a walkman-type one) when I came across a review in one of the Sunday papers the other week which complains that digital radio in the UK has gone for quantity over quality. Some of the stations broadcast at 128k or less, sounding noticebly inferior to a good quality FM reception.
There are plenty of discussions of this around the 'web:
http://www.google.co.uk/search?sourc...antity+quality
Personally I'd steer clear of DAB if you're looking for quality sounds. If choice is all that matters, then why not go for it...