What do you mean by gentlemans?
I'm a blue collar guy so my gentlemans knife would be way different from some suit that drives the newest BMW every 6 months and parks in the handicap spots. For a straight up look at me and my expensive toys kinda knife I'd say a Spyderco GB air, very elegant and pretty and the best materials and I'm sure it cuts stuff well but it's not for me. For me a gentlemans knife has to be sleek and interesting maybe with some modern material for the handle but still has to retain just as much usability as a regular EDC (and it must have a clip, I just can not use a knife without a clip) and for that my two choices would be either a WH E10-8(or -3 if you don't like silver twill) or a Sebenza and if your really going to use it as a knife the Sebenza wins no doubt.
*If you like the GB Air no offense (however if you drive the newest BMW every 6 months and park in the handicap spots then by all means take offense), I respect its a well made knife from great materials with great F&F and at an amazing price point for what all you get but it just looks like a toy to me (and again I have to have a pocket clip on the knife its self).