I personally think going beyond 2000 is overkill. After the first one or two passes with hardwood, I personally don't see any difference between 1000 and 2000, and have not seen any difference in longevity of the edge other than those first couple of passes. I am not using Hock blades, tho, so there may be an advantage in longevity with them by going to the finer grit. As long as I can get shavings around .001, I feel its sharp enough.
Go