noam-h
There was a fellow at our field that flew the Zen 90 for a while a few years ago. He was trying to decide between the two also and he was told that the Zen was an updated Tai-Ji. The Zen's got good reviews when they came out. For alternative choices take a look at the Exceleron and The CA Epsilon. Both planes have long threads going in this forum. The Zimpro Vipers fly very well also.
DEG