I put in another vote for the 8". I have a 325 and a 1200. I use them all the time. The 325 isn't too corse to bring a bad pocket knife back but will still lap a norton to a velvet surface. The 1200 will tune up a pocket or kitchen knife to a great edge. I would still like the 600 and the 8000 in 8" for knives not so much for razors.

BTW the after having the DMT to lap the norton you will wonder how you ever did without.

Don