Yeah, the problem is that it's pretty hard to find a legit Tai Chi school in America. Unlike say boxing or Judo where BS is fairly uncommon, internal Chinese Martial arts have a history of being taught poorly by frauds or by people who didn't know what they were doing. There's some good ICMA out there, but you gotta dig deep to find it. Even if you do find it, it's honestly doubtful that training in those particular styles will make you a better fighter, or really compliment your Kenpo training.
Try it for a month, and let us know what you think.