If you like small, I just bought a Boker Gamma. 2 1/4" blade and weighs a little over an ounce. Very sharp ceramic blade.
It does have its downsides though. You have to send it back to get it sharpened(although it is supposed to hold an edge for a long time without abuse), and the blade can break if abused or used to pry.
I love the light weight.
http://www.boker.de/us/index.php?c=3...s3=999&p=&pp=0