B&W vs PSB

I don't know about the synchrony ones but I auditioned the twos and they were great.

The PSBs will trounce the B&Ws. You will have to go far up the B&W line to get comparable performance. You can use a less powerful amp as well.

Looking at the specs for both speakers, it's important to compare but of course listening to both is vital.

PSB Synchrony One B&W CDM 7NT

30hz to 20,000hz 40hz to 20,000hz
90 dB sensitivity 90dB sensitivity
4 ohms nominal impedance 8 ohms nominal impedance
full range speaker 2-1/2 way speaker

So the PSB will need more power to drive it because of its 4 ohm nominal impedance vs the B&W CDM 7NT at 8 ohms. The PSB will go lower in bass ext vs the B&W. THe PSB is a full range speaker vs the B&W being a 2-1/2 way. So as long as you have the extra power, the Synchrony One will be superior to the B&W CDM 7NT.