FM via Troughline will, IMHO, knock the spots off any other way of receiving the Radio. Let's hope they never turn off Analogue Radio as they have with TV.
DAB is pretty awful but suffices for 'day to day' listening. Not Hi-Fi though.
With a decent DAC, listening via PC is pretty good from sites such as...........
http://www.radiofeeds.co.uk/other.asp (still not much better than MP3 though).
There are also some other good feeds via URL's which were printed in 'What Hi-Fi' (?) or some other such magazine last year. Sorry I don't have details though. I seem to remember the Radio 3 feed was pretty darn good. (Sounded a lot better than MP3! JRiver said it was 48kHz 16 bit, don't know what bit-rate though).
The Freeview feed is not too bad either for listening this way (with a DAC). Better quality (bit-rate) than DAB.
Magnum Dynalab make some of the very best modern FM Tuners but the price tags reflect this!
Pioneer made some exceptionally good Tuners in the 70's and 80's (sorry to disagree with the previous Poster!). But their very best efforts I think were always reserved for their Receivers. So, if you've already got an Amp...............
Get yourself a Leak Troughline, get someone to service it (correctly) for you, spend a decent amount on a proper Aerial and you won't look back. But start petitioning your MP to keep Analogue Radio going!
Jim.