I hate it when people say "if you could find just a few more dollars..." but, if you could find a few more dollars, try to find a used Ayre AX-7e. I believe the B&W 805s has a first-order crossover, but cannot say if they are time and phase aligned. The Ayre would be a good match.
The room really dictates the need for a sub with the 805s'. I also disagree with the need to high-pass your amps for solid subwoofer integration. I had a REL Strata III when I owned B&W N805 speakers, and had it rolled off somewhere in the 30's. Integration was smooth and seamless. Again, the room has a lot to do with this.
The room really dictates the need for a sub with the 805s'. I also disagree with the need to high-pass your amps for solid subwoofer integration. I had a REL Strata III when I owned B&W N805 speakers, and had it rolled off somewhere in the 30's. Integration was smooth and seamless. Again, the room has a lot to do with this.