I am currently running a Dunlop D732 on the rear, and Michelin AC 10 on the front. The Dunlop would probably be ok in dry conditions, but it is rubbish in the mud. It struggles to bite in, and equally struggles to displace mud.
I am planning to try a few different styles of tyres next, but will inevitably end up with a stoneking. The guys I ride with rate them, and they are great in the mud when dropped down to 8 PSI - they have very strong sidewalls and the guys have had next to no issues with puntures.
The Michelin AC 10 is a long lasting tyre IMO, It maintains it's knob shape but I find it a bit skatey on harder packed surfaces, and although it is road legal, they are very rough on the road.
I used to run Carlsbad's on the KDX and they were an ok tyre, the front used to wash away a bit, but I have been told that is more a trait of the KDX, rather than the tyre. They last pretty well, but are more an alrounder tyre for different conditions I guess - jack of all trades master of none.
The tyre I am going to try next is a KDF, they are on ebay for around $60 including postage - worth a crack at that price. :blink: