If your on a tight budget I recomond the kbar dozier- can befound for 16-20 dollars usually. I gave out three of these last year as gifts, and converted two people into daily knife carriers.
Little but more I like any of the spiderco offerings, and most of the crkt. My personal favorites are my spyerco native III and benchmade griptilian. If you have a budget of 100$, I recomond go pick up as many knives as you can and have fun, its easy to find something good.