CWL has a valid point (has a good taste in knives as well). I'll wholeheartedly second Benchmade as a serious contender.
I'm on my second Benchmade Elishewitz Stryker and couldn't be happier. I'm the kind to buy a combat folder and grow tired of it quite readily, finding critical flaws and such. Not so with the Stryker. As with most Benchmades combat folders, it features titanium liners, an ATS-34 blade and G-10 scales. But forget all that, she's as quality as you can possibly imagine from a production knife. Plus, with it's disk stud and superior ergonomics, it opens as fast and fluidly as any switchblade with minimal practice.
The first one? My brother-in-law refuses to give it back... and he's a diehard church-going man.
My only complaint would be the teflon finish. It doesn't stand up to rigorous use. If you decide on the Stryker, opt for the non-coated blade. They really should have chosen titanium nitrate for a blade coating. Again, that's it's only vice, which can be avoided.
If the $90-$100 or so for a Stryker seems too steep, perhaps you'd do well to look into the CRKT Point Guard. It features Zytel scales in lieu of G-10, but she's certainly well made. CRKT is definately a sleeper cutlery shop if I've ever seen one, though seemingly gaining justified recognition. The quality is outstanding, far exceeding what you'd expect from such a reasonable price. Look to spend around $35 for the Point Guard.
Good luck!