I'm running a pair of B&W Nautilus 800's here at TP and got to demo the Ncore. Its absolutely INSANE to see an amplifier the size of a 6 inch veggie subsandwich powering the 300lb+ B&W's but let me tell you, I really didn't even feel like they were inconvenienced by them.
I originally had a Mark Levinson No333 powering them and I currently have Emotovia mono blocks. If I had the money Ncore would be in hand now. They have ZERO noise floor and as mentioned above do feel like a Class A land yacht (tons of power to spare, very dynamic and able to drive complex loads).
Anyway, if you have the means get some, the guy is a freakin' genius.
Tone Proper Mastering LLC - Analog Mastering