Rebbi,
There is a Zu vs. Tekton thread on the Audiogon. It was a couple years ago and was very good, a lot of posts pro/con back and forth. If I can summerize it overwhelmingly came out in favor of Tekton. The Zu's apple to apple cost much, much more. Do yourself a favor and look it up. I believe it started by a fellow named gpowered. Many A-gon regulars posted.
There is a Zu vs. Tekton thread on the Audiogon. It was a couple years ago and was very good, a lot of posts pro/con back and forth. If I can summerize it overwhelmingly came out in favor of Tekton. The Zu's apple to apple cost much, much more. Do yourself a favor and look it up. I believe it started by a fellow named gpowered. Many A-gon regulars posted.