You may want to post your question on the Harbeth User Group. Many friendly Harbeth users there who are more than willing to share their experiences.
I'm currently using Foundation Stands. The quality control is serious lacking with these stands. I've got one good stand and one that is a bit tilted. I've had to attach bumpers on one side of the stand in order to ensure that the speaker doesn't wobble. I'm seriously thinking of changing to Skylan stands but I've heard that the open stands are better for the Harbeth because of the lossless design of the speakers.