Hi flyboy320, welcome to the forum.
There might be different opinions on this from other people but my personal view is that the 100/200 & 400/600 stones will be fine for kitchen use. In fact there have been a couple of times with my cheaper knives when I stopped at 400 or even 200 just to deliberately give the knife a rougher, toothier edge to slice with.
But the beauty of the WE system is that you can add stones later and upgrade parts without having to replace the whole thing, so if you decided you wanted the 800/1000 stones you could just buy them further down the line.
But for the kitchen I think you’ll be very happy with the basic kit, at least to begin with. It’s still better than any other sharpener I’ve ever used. just remember you do need to attach it to some kind of base. You don’t have to buy one yourself, you could make one, but it does need to be bolted down to something heavy in order to work.