http://www.scrapyardknives.com/knives.htm

You might also check out Scrap Yard Knife Co (sister company of Busse and Swamp Rat; Scrap Yard is the more utilitarian of the 3 companies). Everyone I've talked to has had very high opinions of all of their knives (VERY tough knives). Several of them should fit your criteria and price range.

Edit:
Chris Reeve Knives has a couple of very nice knives also, though they are out of s30v stainless. Its a good steel, holds an edge well, and since he doesn't treat it as hard as a lot, it should sharpen pretty easily. (if I remember right, he was one of the knife makers that CPM was corresponding with when they designed s30v, so he should be able to work it well).

http://chrisreeve.com/

Another edit:
Swamp Rat has a knife right now that is 5 3/8" for sale/preorder (Ratmandu is its name). Their business model is a little weird (you have to pre-order, they only make a model or two at a time, but they make good knives as well.
details here
http://www.swampratknifeworks.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=10;t=006937