Yeah I agree with that sentiment. I normally feel the urge to try new stones to find the "perfect" stone in each grit range , but I no longer feel that urge for 1k stones. The FSK 1k is pretty much everything I could want in a medium sharpening stone.
Very fast at removing material and great finish. Very hard (my preference) and great subjective tactile feeling and sound. Still hasn't dished yet and doesn't load up.
If the abrasive material were thicker I would happily call this a stone for life. I've tried it with various steels and I enjoy it with them all. It is particularly great with soft stainless steels, which are not the best with some other stones. I also highly rate the JKI800 Vitrified Diamond and compared it directly to this one. The main difference between two was that the FSK didn't load at all with soft stainless over any length of time. This wouldn't be an issue for some people but i use alot of softer stainless cleavers. However the JKI is 8mm wider, which may not sound like much but I think it is very noticeable and is one aspect I think it is better than the FSK.
Im also really enjoying the FSK 400 too. It is very very fast and cuts about as fast as any stone I've tried. With how fast the 1000 is (probably faster than most 400 grit stones), Im currently only using it for thinning and occasionally to set bevels on really dull knives. The 400 is also an excellent stone and between the two you wouldn't really need anything else for most kitchen knives.
They were quite pricey but I agree a solid investment for someone who enjoys sharpening or does alot of it.