Just to add my own tuppennorth'
When wiring the 2 pin DIN plugs, the small round post is the positive side of the speaker cable and the flat spade is the negative.
I agree with Kevin re: the CX100's especially if space is an issue but a lot of these will suffer with foam rot of the bass & mid range drivers. If space is no problem then any of the 'S' series from the S40's upwards are excellent speakers (which I personally prefer to the CX range) and a good cosmetic match. Try to find some with the original stands if possible as they really help the sound stage - and look pretty damned cool. The added bonus is they can be bought for peanuts although they are almost certain to also suffer with foam rot around the bass drivers but this isn't too difficult to put right if you have good DIY skills and patience. Some of the 'S' series speakers had rubber driver surrounds - the S60's spring to mind here - so don't have this problem.
If you're intent on buying B&O speakers then please feel free to ask for advice if you come across any likely candidates.
Chris.
The use of metaphors should be avoided like the plague. They're like a red rag to a bull to me.