an underrated one is the cold steel ti-lite. I have the zytel and titanium versions and it works great for most of my EDC chores, especially since i prefer a thinner blade for things like cutting oranges, peeling apples, etc.
BM Griptillian is also good for the money, but the same $$ as the zytel ti-lite.
i plan on getting a BM 710 just for a bigger blade.
spydercos are nice, but i don't like their design. Lockbacks make me nervous, i'd much rather prefer an axis for that money. the only spyderco I own happens to be the karambit, which is excellent because it has the smallest blade of all my knives and is legal in all 50 states, so you can take it places you can't take other knives. And it looks intimidating as hell.
Camillus, the EDC is ok but i would shell out a few extra $ for the dominator, it is well worth the money.
If you work in an office or are around sheeple-type people a lot on the job (ie your workplace does not require a knife/tool), then I suggest you get one of the benchmade osbournes with the pretty colored handles. It still has a sizable blade, but for some reason the pretty designs on the handle make people look at it as more of an expensive letter opener than a knife. And trust me, if you work in a consulting firm or bank or anything of that sort, you definitely do not want to be known as "the guy with the big scary knife".