considering it is the same kind of ram in term of specs, it should not have any problems.
regarding the possibility of cloning the harddrive in order to load the image on another computer, no problem EXCEPT that you may certainly have some work to do in order to boot the B&O XPe from it.
I am thinking buying a BM1 in order to to this hack. The BM3 is the same kind of hardware, a little better, but far from any ATOM setup, which are far away in term of performance as any regular processor.
I do not work for B&O, but I am sure they work on a new BM, probably using this kind of hardware (Sigma Designs 8642) with network streaming possibilities.
I am the owner of a DUNE HD Smart B1 (http://dune-hd.com/hd_players/current/134-dune-hd-smart-b1.html) and I realize that the work for B&O to make a setup like that is not as difficult as it looks. They prove to have made some nice work with BM1 and BM5 in term of hardware integration and software developement, so they clearly have the capabitilies and human ressources to make such a universal box.
Keep in mind that it is a new world from B&O : it is the computer one. Clearly, it needs other competences than the one needed in audio/video techs.
sergio