1) CRKT BearClaw
Got this one as a gift. I wore it every day to work at a feed store where it saw heavy use cutting open bags, rope, coming in contact with sand, gravel, mulch, and god knows what else. Its got a nice handle and most people don't notice it carried horizontally on my belt, and when they do they dont know its a knife till I use it. I've carried that for about 2 years.
2) CRKT BladeLock (The original)
Bought this one myself because of my fetish for knives that are anything but liner lock or lockback. Again this saw use for over two years at the feed store. The other fun thing is that when I handed it to my co-workers when they didn't have a blade it'd take 'em 5 minutes to figure out the lock. The only problem I had was when I ended up sliding on my bicycle, I landed on the side that the knife was clipped to and scratched the clip and bent it a bit. I cant find a Torx wrench to fit the screws to get it off and correct it. That has been supplanted by my SOG Flash 2, but my girlfriend now carries it until I buy her a Blade Lock II and she seems to like it.
Take it from a broke ass college student, CRKT makes knives that will stand up to hard use for a really good price.