I have a pair of Keen's (and the whole left/right thing cracks me up) and I also have Smartwool socks (probably 5 or 6 pairs).. but I have to say, my favorite wool socks hands down are Teko's! You have to be careful with the smartwool socks since not all of them have seamless toes (some do, but it's not always obvious since they don't all seem to say if you're buying online), but ALL of the Teko socks do... and I really like the fit. They seem a little bit snugger than the smartwool socks.

REI carries them, as does Backcountry, or you can order directly from Teko.

I don't even wear non-wool socks anymore... can't stand them AT ALL