Mac Users: What desktop twitter application do you use?

I have had twitter for about a year now, for following a company at big apple events, but only for the past couple days I have taken big interest into Twitter and I would like to get into it. I am looking for a good light weight twitter app. Right now I have nailed down to “Nambu”, “Canary”, and “Moonblast” (which also updates facebook)

From all the billions of twitter clients (excluding dashboard widgets and Adobe AIR apps), which client do you use. And which one is supposedly best.

I see twitterrific is supposedly the most popular, I used it, I didn’t really find anything so great about it.