Decision between Zu Definition OR VS DB99

Gregm, your post is based upon speculation, not having heard the Zu Definitions (which you graciously admit). Unfortunately it contains some errors.

Nealhood, Zu offers a 60 day money back guarantee and in fact insists that you keep the speakers for that long so you give them a chance to break in. They sound great with tubes and are OTL friendly.

The Zu Definitions require a larger room than as used at RMAF in Denver in order for the drivers to integrate and allow enough breathing room for the woofers, so comments about the sound there should be discounted.

Bornie, many may not be aware of your affiliation as a Von Schweikert dealer, as was the case in the Speaker Asylum when you posted as Jack B there.

Both speakers have their proponents yet are quite different, so home auditions are very important. I have no connection to either company.

Hey Mark, Sean and Adam visited Chicago back in October and brought the Druids and the Definitions to demo. Maybe they can refer you to someone in the area who has a pair of Definitions.
Brian