I carry a SOG Flash II.  It has a clip.  I has a 3 inch drop point blade.  Very sharp.  It weighs about 3 oz.  The thing I like about it the most is it is spring assisted when opening.  It's not a switch blade but all I have to do is start it and the knife does the rest.  Fwack!!  It has a safety so it won't open in your pants.  My would that be exciting!!!  

  It is true one handed with thumb nubs on both sides of the blade.  I love it!!!  I did a lot of research before I bought it.  I suggest you get the best steel you can afford.
Good hunting,  TJ