I like the Dunlops as well. Went to the 756 front and rear and am digging them. Had the old 739 on the front and wasn't too happy with it, too hard. May try the new 952 on the rear next run.
i just rode once with a ms3... its snowy around here, but on the shoulder of the road i got on it a bit... and it grabs pretty nice, and I shot a roost about 25 feet back.
The best tire is the one that slips the least on the terrain under the bike. Dunlop makes good tires, but even they know that no one tire can excel on every concievable surface with everybody's riding style. This is why they have so many MX tires, all designed with a different purpose.