Class d amplification

@digitaljoseph   I'm very happy with the performance of a pair of Atma-Sphere GaNFET Class D monoblocks driving Aspen FR10 speakers. The sensitivity of the FR10 is 86.5 dB, which quite similar to the KEF and Joseph speakers you mentioned. The A-S monoblocks are incredibly transparent and power the FR10's planar tweeter and midrange driver with amazing realism and an absence of harshness. The low end is great, too, conveying impact and natural tone to drums and stand-up bass. 

I can't tell the difference between GaNfet class d and modern amps from Purifi and Hypex which cost half as much at twice the power. Even GanFet purveyors can't (won't) defend it. All they got is "efficiency" and "runs cool."  But that's common to all Class D amps so mn

Any Aavik amplifier will do, if you can afford the i-280 is the one to get.

Wyred 4 Sound SX-1000 R are 1000 watt Ice Modules with nice power supplies and proprietary input boards. 3200 USD. Head room for your Blades. Gear depreciates precipitously so buy low to insulate yourself.  

Class D cannot outperform a great AB amp. 

@vinylshadow That was probably true a few years back. But these days it isn't by any metric you might find important (imaging, depth, smoothness, musiocality, distortion, etc).

I heard a class D at AXPONA about 8 years ago that convinced me that if we didn't get a handle on class D we would be left behind. At this point class D is so good that I am convinced that tube power amps are on borrowed time as well as class A or AB solid state amps. There's still life left in them but ten years from now the market will look very different!