I actually have a cheap King stone (the 1000/6000 combo), but parent is right.
1000 grit gets you more than sharp enough for daily use while still being coarse enough to fix up a well-maintained knife in about 20-30 strokes per side.
Higher grits make the knives too sharp, to the point where they're dangerous to handle, especially if you're cooking drunk/tired. (That's not to say I never use it, but it's always for fun at that point).