PERSONALLY, I'm not a fan of DAB radio - prefer a good FM set. However, the cheapest recommended set (Which?) is the Roberts Ecologic 4, about £65. There are several "Don't Buys", mostly £50 or less. Some sounded pretty bad!
I have a lovely white DAB from Argos - their cheapo value range I think - about £20 - it is fab, reception is great, but it eats batteries...i've got to get a plug in electric adaptor for it, as you don't get one with it
i bought one from Argos, under £50, its Bush make
have a look on their website, they have probably come down in price.
Love the Roberts radios but they are an arm and a leg