I think Chris is right about the amp in the 9500 - not B&O's best ever....
In that case it might not be man enough for the Beovox Pentas, but an early pair of Beolab Pentas would not set you back that much more than the Beovoxes, and having the inbuilt 150w amp, will have more than enough power to keep you entertained! Watch out for foam rot on the Pentas though as they suffer in the same way that the 'S' series speakers do, and with many more drivers in the Pentas, it's more of a job to refoam them if you go down that route :P
President, Beomaster 8000 Appreciation Society