So much to choose from....
Only 3 companies I'd buy from that are production Spyderco, Benchmade, and ZT...Since I don't own a ZT yet I can only recommend the spydies and Benchies..
Spyderco, out of the ones I have experience with I'd say the Manix is the best of the bunch, I have not tried the military models yet...
Benchmade the 710 is fantastic, Stryker is a great model too, I do not care for Griptilians though..
Best of luck.