tough one
1. Endura 4 (big enough and light enough and yes, cheap enough for EDC on the job)
2. Gayle Bradley (Just an awesome knife)
3. Para 1 or 2 (great knives)
4. Dragonfly 2 (can do 90% of EDC jobs required of it and won't scare the sheeple)
5. The Sage series - I prefer the 2 (great gents knives)
Honorble mentions:
Native, Delica, Dodo (it's just cool) and because I've had one for forever, a Chinook.