Well, you've made a great start.
Do you want to spend the $200 on just ONE knife or do you want to mix it up a bit? If I had two hundred bucks to spend on a knife, or knives, I'd have to go to the Cold Steel website and get the monthly special of TWO Konjo tanto knives for $200. I got a couple and they're breathtakingly beautiful.
Or, if that doesn't suit you, you can get on over to eBay and buy one of Cold Steel's new Rajah I or IIs. The Rajah I is about $200, while the II is about half that, maybe less. The Rajah I is gorgeous, though, and much fancier than the II. And it's the strongest folder available.
Finally, no collection is complete without a more expensive Spyderco. I like the longer blades, but it depends on what YOU like. My CS Voyagers all sport 4-6 inch blades. The Vaquero Grande is being discontinued and may be a good investment if you can find one. The 6-inch Ti-Lite also is a great knife to have. I thought I was going to hate it, but I was surprised.
Let us know what you end up with, though.