Email Matt Poes at Poes acoustics. He sells KEF and the Reference 5 was something I was interested in. Don't quote me but the KEF didn't have the dynamic range of say a Perlisten and likely, the 1528 Tower. Cleaner response but lacked that dynamic "wow" that the others provide in sheer volume. I think the KEF Reference line are the best looking speakers around. For the smaller speakers like the 1, s4b, and 1528 Bookshelf 8, I would think for not much more size, the 1528 Monitor 8 is a happy compromise in size and power. But won't know for sure how "improved" they are over the 1723 line until James Larson finishes his review. Totally different designs between MTM and TMW etc.