To me, as an all good purpose and not to expensive, Ka-bar has proven itself. An US company, most knives made in US and a rich history. Available in different lenghts, from small to very big blades, with or without serrations and with different grips such as leather or black kraton. The 1095 steel has proven itself over the last years to say the least. Kabars can take some serious beating, stay sharp and are easy to re-sharpen. When you go for the black Kabar you have a knife that is suitable for all weather conditions. They will never fail on you.
You can also look at the Becker Dpt. from Kabar, very nice ones their too. In most cases you will stay far under the US$ 100,-
This dealer has it all, good prices, superfast shipping and all details about Ka-bar:
http://www.tomarskabars.com/index.html I also like my Canadian Special form Bark River very much. I have it with mycarta handle and A2 steel and then it is around the US $ 150,-
I also own their Bravo-1 in CPM-3V steel, which is build like a tank.
Mind you that BR knives come with convex edges, which you might have to learn how to re-sharp.
Those are much my all-purpose knives I can recomnend.
Hope this helps and enjoy the ride!