Has anyone ever switched to Harbeth

Well, if its just that you are bored at least you will be trying something significantly different sounding from what I have heard.

Here's a link to a system thread here where the owner switched from a nice pair of Dyn Confidence to Harbeth that drew a lot of interest. Check that one out.

http://forum.audiogon.com/cgi-bin/fr.pl?vevol&1176687829&read&keyw&zzdyn%20harbeth

"My Dyns had to play loud to sound their best.. "

I have Contour 1.3mkIIs. They also sound best with some volume. My Triangles and OHM Walshs are probably better at very low volumes.