Benchmade WHOO WHOO!
Several people have already listed your basic good quality knives. So I won't waste your time w/ more of the same. I'll cut right to the chase. Buy a Benchmade. They are generally considered one of the best (the best, in my not so humble opinion
) knives out there. Benchmades are to knives what SIGs are to guns; in that both are generally durable, reliable, affordable, and WELL-MADE. Also, Benchmade will factory resharpen your knives for life. All you have to pay for is the couple bucks to ship it to them. They even pay the shipping back. I sent in four of mine this past August, including the knife my dad wrecked trying to cut the steel belt off a tire (don't ask). That thing was like a butter knife and the tip was gone. Now I could probably shave with it.
Bottom line, if you are willing to invest $100 or so in a quality knife a Benchmade would be worth the money. I recommend the Stryker, AFCK, and Ares models. My $2*10^-2...
Regardless of WHAT you buy, I would recommend checking out
knifecenter.com. In my experience they are vastly under retail price and will even beat most other bargain knife companies. I buy all my knives there. Good luck.
(P.S. I'm not really this opinionated, but I figured it'd be for fun if I pretended I was. And it is...)