True there are a lot of stones out there. Each one is for a different job. There are a few things that you have to think about when you select stones. Do you want a hard stone or soft stone. Do you want to cut or polish. Do you want to shape or sharpen. Do you want to blend or to be very accurate. Hard stones keep their shape longer but generaly cut slower. Soft stones cut faster but wear faster, so if you need to keep a flat surface these are not your first choice.
Some people like water stones, I don't find them of much use. They are soft, wear fast and can be messy. Don't waste you time or $$ on the kit. Wait until you know what you like. I don't use a stone to deburr, unless it's hard material, a good set of files gives better control. As far as touching up a mill table you shouldn't have to do that very often. If you find yourself doing it more then once a year then you need to look at the way you are working. Everytime you touch a stone to the table you are altering the flatness of the table. If you always have dings and dents then use some sort of table guard and clean off the chips before putting on a vise or part.
Off hand I think the best types of stones for someone that doesn't use them a lot are the dianond; stick, rod and mounted type and/or ceramic. They cut fast, hold their shape and last a long time. They come in many grits. Then slowly try out the other stones and make your own choice later acording to the work you do.
