The 2150 can't bi-amp. It does however have a solid power supply.
I was recently running a pair of b&w 686 with the 2150 in a room
Of similar size to yours. With the volume up 1/3 of the way it was
Pretty darn LOUD. Louder than I care to listen.
With those speakers I suggest you pick up a good subwoofer.
I crossed the 686 speakers on the 2150 @ 100Hz. It really made
The speakers open up,they sounded better when they didn't
Have to re-produce the lower bass notes.
I am very happy with my 2150...I actually bought it because
I fancied it's good looks.
The Outlaw M8 subwoofer would possibly be a good
Match with those b&w's. $250.