Over the years, I have collected a lot of B&O most of which I no longer have. I do still have a few favourite pieces though but wondered if we were all set an arbitrary limit, what we would have. So the lists do not become unworkable, there are some rules! 
1. No current products are counted! These are clearly for everyday pleasure but are not collectible as anyone can just buy one!
2. I am afraid I am going to start from The Beomaster 1000 era - I too lust after a Jet radio but these are too esoteric for most of us!
3. Only one of each type - i.e. one Beomaster, Beogram etc.
4. Only five products!!
I'll start!
Beogram 4000 - the best sounding Beogram made by B&O. (The 3000 doesn't count Frede!!)
Beolab 5000/Beomaster 5000 - Counts as one !! (I am allowed to cheat!)
Beolit 700 - I know the older ones sound even better but the style and sound together make this one stand out.
Beovox M100 - they just sound wonderful!
Beocenter 9500 - my wife likes this one!