A lot of your views seem to be a little inaccurate, although that's understandable having only read about it on forums.
The BeoSound 5 is not the head unit you control, the BeoSound 5 is a combination of both the head unit and the socket unit (called the BeoMaster 5 when by itself). Very similar in a way to the BeoCenter 2, except the socket unit can exist by itself.
The BeoMaster 5 is a 'brain' to drive your system. You need some way of interacting with it, whether it's via a BeoVision, or as part of the BeoSound 5 (I would personally choose the latter).
If both were combined, the BeoSound 5 would be visually HUGE, and I don't know about you, but I feel the appearance and feel of the BeoSound 5 is just right - not too big and not too small.
As for the lack of format support, the only 'hurdle' I can see is ALAC (or as many call it, Apple Lossless). This is something I would like to see B&O support for, but at the moment, it's not a huge issue IMO despite being an Apple user. FLAC is well, used by a lot of people, but IMO both WMA and ALAC are better as they work with mainstream software such as Windows Media Player, iTunes and of course BeoPlayer.
As for increasing the disk space in the BeoSound 3200 - I couldn't disagree with you more! π Imagine trying to browse 15,000 songs on a little screen like that. It's fine as it is IMO.