bkm,
The 8B-ST is an excellent amp - I own an 8B-ST-Pro. I believe it would be a
good match with your speakers based on it's power output and the price of
your speakers. The SST amps are better in my opinion but I used an 8B-ST
for several years to listen to music. Each channel of the 8B-ST has enough power to
drive you quads, but if you want to experiment I would try bi-amping instead
of bridging.