With my present B&O systems 6000 and 8000 + extra I'm perfectly happy with my setup and as far as a Beocenter 9300/9500 I really don't know. Its a great design, more simpel and less space but I'm keeping my current systems and would love to A-B them with the next system before making a purchase.
As far as Penta's it seems that they have more trouble than the older MS,M,S series and as they have to go by Dillen first in most cases despite being less old its a matter of transport and space at home + the extra money the cost will be.
I dig the sounds of my M150, S80.2, S120 and I don't really need a change at present. It just happens as you are on the way out of store and there it is you know. Beocenter 9300 and a pair of Beolab Penta's upclose and in the flesh.