Now I understand your aim.
Times have changed. I'm no expert on this topic but as I understand it, DAB radio has become very crowded over the years as more stations have been shoe-horned into a limited bandwidth range. DAB radio stations now have less bandwidth (on average) than they did many years ago. Basically, DAB audio quality has been so compromised that it's now, generally, considered unsuitable as a hifi source - note that there may be a few stations that are an exception. And you certainly won't get that 3D sound you're after using DAB as a source, generally speaking.
Many folk now consider Internet radio as a superior alternative to DAB. I use both DAB and Internet radio and I would agree that Internet radio is, generally, better quality audio (although many, maybe most, Internet radio music stations still don't broadcast high quality sound):
DAB was launched in the UK in 1995 with the promise of a greater choice of stations, a more robust service with less interference and noise and better sound quality. Whilst some of these benefits have been achieved, there have always been concerns about the sound quality on DAB radio, which is...
bestradios.co.uk
However, what I say is irrelevant if you're happy to have DAB as your main source of music.
If you're considering 1980-90 amps, you won't go far wrong with an amp from Denon (their PMA range), Rotel, NAD (3020i), Pioneer (A400), Mission (Cyrus one), Audiolab (8000A) or Sony. The older the amp though, the more likely you are to suffer age-related issues with it - that's the 'retro' price you pay. Amps from around 2000-10 would, in general, have more life left in them. Marantz PM66SE or PM66KI or PM5003 or PM5004 , Rotel RA-04 & RA-04SE, Cambridge Audio Topaz AM10 and 350A SE, Yamaha AS-500, Technics SU-A600 Mk2, NAD C326BEE. Most of these were popular amps so still appear regularly on UK Ebay and other second hand sellers' websites.