Hard to say without hearing the KEF. However when the Klipsch might be $2000 retail, they actually sell for like $800... so in that case Klipsch all day. I can say they aren't the super bright type Klipsch. They are very good speakers. And those KEF just aren't going to have the output or be reference capable. Then add the Klipsch are sealed boxes which I find desirable for in-walls.