Why do you like colloquy? I found it barely adequate.
I find Colloquy is fine (though it has a bad habit of pinning the CPU every now and then...), but there's nothing special about it. I'd switch in an instant if someone suggested a superior alternative.
What do you suggest for an OSX IRC client?
X-Chat Aqua is good, though unmaintained.
I find Colloquy to be significantly better. For one thing, X-Chat is pretty damn ugly.
X-Chat Aqua is styled like any other Mac OS application. Colloquy's UI just wastes a ton of screen space.
If you're a terminal junkie, then try installing 'irssi' over MacPorts.