@samgar2,
I envy you for the room you have. A pair of ProAc K6/K8 will nicely sing in the room. I really recommend adding bass traps in all corners. This is not just for ProAcs, but for any full sized loudspeakers.
I have the D48R in a 16 X 19 room. This is a purpose built audio room with treatments. The bass traps made a huge difference, without which the mids would have smeared up. If you can afford the K8, go for it. But remember to also add the bass traps, without which you will be hearing more of the room than the speakers.
I envy you for the room you have. A pair of ProAc K6/K8 will nicely sing in the room. I really recommend adding bass traps in all corners. This is not just for ProAcs, but for any full sized loudspeakers.
I have the D48R in a 16 X 19 room. This is a purpose built audio room with treatments. The bass traps made a huge difference, without which the mids would have smeared up. If you can afford the K8, go for it. But remember to also add the bass traps, without which you will be hearing more of the room than the speakers.