I never even considered a multi-protocol chat client as a viable option for an IRC client.. not sure why. I use Trillian Pro myself, and love it.. but I've never once tried doing IRC with it. Opera is also my main browser, which has IRC integrated... I never use it.
I just installed and tried Klient... and I must say, it blows me away. For the first time, EVER, an IRC client's setup options and interface actually make PERFECT SENSE. Even mIRC takes quite some getting used to until you get the interface and especially all the options and settings... Klient seems to be the way an IRC client SHOULD BE MADE. I'm rather amazed at the moment, I must say... I haven't connected to any channels yet.. just went through the options and customized here and there.. but just that left me very impressed.
I'm sure I'll report back after I gather some more info on Klient's performance/quality, but for right now, I'm quite impressed. (Their website became usable again and I was able to download