If you do decide to stay with straights dmt 325 grit is worth its weight in gold. i also use it for major bevel setting and repair. its works great for making slurries too. the break in period is tricky, i had several diamonds that stuck up too high and left swirls or scratches in the water stone. you can rub the side of a screw driver in it or lap an old carborundum stone to even the dmt out. they cut fast and smooth. i enjoy it a lot more than the sandpaper trick. it will last you a life time. i absolutely abuse mine then clean it with some dish soap a it still cuts like the day i got it. heres where i got mine

http://www.amazon.com/DMT-D8C-Dia-Sh...ywords=dmg+d8c