Only those who can appreciate the little things will feel that CRK's products are worth the money. You need to be able to appreciate impeccable build quality, perfect fitment and function and finish, all the attention to detail, all the "go the extra mile" little touches nobody but you will ever notice, top of the line material quality, a design that has been constantly tweaked and perfected over 25+ years.... all those things add up. All those things require many times the amount of machining and production other lesser knives do.
Not everyone who buys a Sebenza thinks it lives up to the hype. All the praise you read on the forums can give you unreasonable expectations. In reality it's still just a knife, the same way a Rolex is still just a watch. Do you need to spend $400 dollars to get a knife that will last a lifetime? No, get a Spyderco Delica. Will it open a package any better than a Kershaw Skyline? No it won't. Does it have the best cutting edge (pun intended) super steel? No. But it is a damn good knife. Every time I pull out my Small Sebenza to use in a practical way I just can't help but marvel at its perfection. Its simple, elegant, and flawless design is just something I've never seen in any other production knife. They're built with the same care and precision that well known custom knife makers use in their products. The warranty and CS you get from CRK is second to none.
I say buy the Sebenza to satisfy your curiosity. Because if you don't, and you buy the Domino and the 560, you'll still be wondering about that Sebenza. Worst case scenario you don't like it, no biggy, sell it here on the forums. Even if it's a little used or lightly scratched you'll get 90% of your money back which you can then use to get something else. And at least at that point you know the knife isn't for you. I remember guys told me to buy a Bradley Alias II instead of a Seb. I don't know what that knife is deemed the Sebenza killer. Because it's a Ti framelock and has a blue thumbstud? That knife was junk for the money. The Sage II is excellent but still not on par. Just grit your teeth, get it, and carry it.