I disagree with most people here, I say get a variety of cheaper (but not "cheap" or just junky) knives and find what you like. If you splurge on a knife right now, in a week you'll see something else you want and won't want to spend more money.
Get a larger knife, a smaller one, a multitool, a traditional/classic one, a "tactical" folder, one plain edge, one half serrated, a hawkbill shaped blade, a liner lock, a lockback, one with a pocket clip, one with a sheath and so on until you find what you like, and more importantly what you don't like.
This way you'll never have to look at a $$$ purchase and wonder... or at least not as much! This isn't a hobby for most, it's an addiction. You'll likely spend a lot of cash anyway over a long period of time, why not have fun and try a lot of stuff out? Without the lower end stuff, you'll never appreciate the nicer knives quite as much.
Go for the good price/performance items for a while, then trade, give away, or sell them and move up. Start with Swiss Army knives, a Kershaw Leek, etc.
Sure, you could buy a Sebenza right now, but would you stop looking at other knives?