I have one of these tablesaw's & i have used my 8" SD508 Freud Super Dado Set with no problems. The 8" also comes in handy if you want to use a sled as it gives added depth. You should be fine with either size. Your not cutting material in half. So your cuts will rarely be deeper than 3/8" - 1/2" or so. My contractor saw is in storage in my trailer & if I had room for a second table saw it would be put to use with the dado set always installed. The saw should handle which ever size dado set you get. I would worry about quality before size for a dado set. This is one item where you sometimes get what you pay for.
Have a nice & safe day!
Last edited by jlord; 01-03-2012 at 04:56 PM.