We don't have "mud holes" in Colorado. The tire most commonly used around here is the ITP Terracross and the Maxxis Bighorn.(on non-sport machines) They are an excellent tire for all-around riding. They do great for the occasional muddy spot, not sure how they would do as a mud bogging tire.
Try the Razr series. Everyone I know that has gone from ITP to Maxxis loves the change.LOL you got "Snow Holes" my manager swears by Vampires. I personally run holeshots but mine isn't set-up for mud.