I own a Cold Steel Voyager with a straight edge and Tanto point. Best folder I have ever owned. And you can get them for about $55-60.
In my book, I don't want to be guessing if it gets down to blade-work at close quarters. A friend of mine (former SpecWar guy) pointed out to me a week or so ago that if you're close enough to cut your opponent, then he's also close enough to cut you. I want a good knife with a great piece of steel for a blade that will hold a razor's edge to make the cutting as effective as possible with as little effort expended on my part as I can.
Besides, you're going to have this knife for a long, long time unless you get rid of it. Why not spend the extra little bit of money for a quality piece?