Since your speakers are bi-wire, I’d get a Balanced Audio Technology VK-300SE integrated (current model now called VK-3000SE). You could power the mids-highs with the BAT and bass with the Bryston (I used this very configuration with my B&W 804D3s with much success). Good luck!
P.S. The BAT has both balanced and RCA "Preamp out" connections which makes bi-amping a snap.
P.S. The BAT has both balanced and RCA "Preamp out" connections which makes bi-amping a snap.