what is the best chat software for webwiz？

In your opinion, what is the best chat room to integrate with Web Wiz?

The old incarnation of my forum used some sort of Java-based chat, which I personally didn't care for. (Java and my voice recognition program do NOT work and play well together.) So when I moved my forum, I installed X7 Chat, but after using it for a few weeks now I find it sometimes quits working unexpectedly, sometimes doesn't show everyone logged in but does show what they're saying, and other assorted weirdness. I'm not happy with it and would like to get something else.

Can anyone personally recommend a good chat room that takes Web Wiz logins, or should I just bite the bullet and give them back their Java chat room?

Thanks for any advice!