We use a Pure Evoke 1 which does everything it says on the tin click here. There is an integral aerial which is essential for good reception but otherwise it fine.
The reason your current DAB radio has poor reception could be the aerial is either not high enough (screened by the adjacent buildings) or it is not correctly aligned for the signal. Your digital TV aerial is likely to be much higher and will be aligned.
As an aside, the `power` of the radio is in its ability to pick up weak signals. It can`t `draw` them in. The transmitter output (35 miles away) should be amply strong enough for the receiver to pick up with its aerial correctly aligned. Before you spend money on a new radio perhaps you should try retuning and/or aligning the extending aerial on your current DAB portable - you may be lucky and find a good spot.
Pure radios have recently been advertised by Morgan Computers click here. The are generally re-worked units but have a full guarantee and are much cheaper than those in stores.