I'm not sure whether the OP is still lurking about, but since I'm a C356BEE owner as well, I thought I'd share my experience. NAD sounds great with Tannoy, and I'd opt for the concentric tweeter design mounted in the center of the drivers. Aside from that, it's also well known that Nad has good synergy with PSB speakers, and I believe they are owned by the same parent company.
On the Nad integrated, I'd also suggest replace the stock preamp jumpers. Audioquest makes a pair as well as a few others, or you can just use a pair of interconnects, but I'd make sure they are shielded. I picked up noise on a pair that were not. Good luck!
On the Nad integrated, I'd also suggest replace the stock preamp jumpers. Audioquest makes a pair as well as a few others, or you can just use a pair of interconnects, but I'd make sure they are shielded. I picked up noise on a pair that were not. Good luck!