For me the Focus 160 where too big in my 16 sqm room, a bit boomy, the sound is lovely but I really don't like when the bass takes over. But all rooms are different. If you get a really good deal you can of course buy and try and sell if you dont't like them.
The Harbeths a completely different in sound, soft treble on both yes, but the Dynaudio's goes a lot deeper! But are not as punchy and "fun" and "real" in the midrange. I like both but they are different!
I like my Harbeths and I listen to jazz, rock and Dylan! :-) I have Harbeth 30.1 too, they are more similar to Dynaudios than the small P3's. What I've of the Dynaudio X Series they don't go as deep as Focus but might be more punchy in bass, smaller in sound... Writing on phone, sorry... Can't explain better now. Good luck!