I'm 1.5 year in Naim world now and combine B&W CM1 (S1) and B&W CM5 (S2) with Naim Amps.
My CM1s are in my 50m2 living room and powered by a SuperNait. This is my favorite setup, the SN has more than sufficient power to squeeze all of the music out of these tiny speakers. I think it is thanks to the SuperNait that they perform so well. I've auditioned Proac Studio 140's and recently Neat Iota Alpha's and they were good but not better than the CM1s - and these speakers are at least double the price. I also think that the CM1s reach further in my ~10 meter long living especially when close to the wall.
I use them on either the original CM1 stands or on the solid wood bookshelves (solid oak). I always have the bassreflex ports closed with the plugs which comes with the speakers. This is needed to have controlled and non-booming bass.
When I listen to music having proper drums, I feel the skin of the drums resonating in my room. Its like someone is sitting there. There is no stereo gap even given the 4 meters distance between the speakers.
When I put the CM1's + SuperNait in my work room (4x3 meters) - there is too much tension in the music. I prefer in my working room my CM5's. I think this is because the CM1's come only to sing when you throw loads of power to them.
I would say: CM1's very good, but have a decent sized room for it and sufficient amplification.
Well, that's why I have Naim.
B&W + Naim can be very good, but is not the most favorite combination on this forum.