Hard to beat a Benchmade. Emersons are nice also. A Emerson Benchmade is my favorite.
Food for thought; The more "tactical" or warlike your knife looks the harder it is to explain why you are carrying it. There seems to be a general predjudice against bladed weapons anyway.
That is why a smaller Gerber E-Z out is my everyday companion. And its size is pushing the envelope in most jurisdictions.