As someone who just bought (Fathers Day gift, but I bought it, you know how that goes) my first Sebenza, a Large 25, I can honestly say for me, it was worth it.
I like bigger knives, so prior to buying the Sebenza, I rotated a PM2 (I have 2), ZT 561, and Emerson CQC-8 randomly from day to day. I work in an office, all upper management and scientists, so I only carried a Cadet in my pocket at work. The Sebenza, while still a bigger knife, seems to come off more gentlemanly than tactical, so I'm comfortable carrying it at work on days I don't wear dress pants.
The Sebenza 25 is the "smallest" feeling, "bigger" knife I've ever felt. Meaning, it has plenty of blade length (3.6") to satisfy my enjoyment of bigger knives, but is practically unnoticeable in the pocket, contrary to the 561, CQC-8, and even the PM2. The almost 1:1 blade to handle ratio and overall thin and narrow size are attributed to it's feel in the pocket.
It's hard to explain, but if you're feeling like making the jump, my suggestion is to try one out. Find an online retailer that will let you return or exchange if you don't like it.
Another selling point for me was, a Sebenza can be sent back to CRK at any time to be completely refurbished for about half the price of a Delica. So although it cost me $445, it's built to last a lifetime, and can be made to look new again any time I wish, or not.
In the end, I value the quality, so it was worth it, to me.