The Ka-Bar Doziers are a grate value for the money. They come with good edges from the factory and hold it for a good while, it isn't ZDP-189 but it is more than enough for EDC. They are light and strong with a very comfortable handle. Lots of different blade configerations to chose from. My only gripe is that the pocket clip is rather plain and cheap looking, though it is functional. For around $20, you can't go wrong. I would definatly chose it over any tanto, especially a combo edge tanto. Unless you cut lots of rope or pierce body armor/use tip for prying, that combo edge tanto won't be very efficient. I like the simple blade shapes because they are easiest to sharpen and they are more function than flash. YMMV.
BTW: if edge retention is really important to you, check out the Dozier Thorn, it is the same design as the others, but with aluminum handles and a D2 blade, it costs a little more though.