All I can say is that your idea of deep thick mud is not anywhere close to what I described and what we have. You are going through muddy water, not thick gooey clay mud. Your 589 tires will get about the best traction of most any ATV tire made, but you are again very wrong in thinking it will have enough power to pull a long very steep hill with those tires on your HPX. The tires will not be the weak link. You only have about half the power that would be required to climb the hills I'm talking about. There's nothing wrong with your HPX or a diesel HPX; or for that matter an RTV or Ranger, they flat out do not have the power to make it through some of the extreme places I have. And, I've personally pushed both diesel and gas versions of an HPX (as well as the RTV) to the point where they all run out of power on steep hills when they have good aggressive tires on them. No if's, buts, or maybe about it.
I'll just keep quiet and let you believe whatever you want. Being that I've owned or used everything you are talking about, I can tell you that guys will be laughing behind your back at your claims. You and I are just on completely different levels when it comes to what I consider a mud bog and what I consider a hill. The HPX, the RTV's and the Mules are great all around UTV's, but they are all under powered for any extreme mud or hills. Actually, the one I like the least, the Mule, seemed to have the most power. I like the RTV and the HPX the best and they are great for what they were designed to do. I don't know why you seem to think I'm trying to put an HPX down. I admitted that it climbed as well as an RTV. I'm only pointing out the obvious and that, even though you really like your HPX, it will NOT do it all. It's a good combination that will carry and haul quite a bit more than the more recreational UTV's will, but anyone who has been on very challanging trails will know, it can't keep up with the lighter more powerful machines that are made more for fun than work.
If JD would offer a better drivetrain (no belt drive) and power steering, I'd own an HPX right now as well. There again, my personal preference for a UTV is for smooth power, easy steering and handling, and no Salisbury type of a belt / clutch system. For more of a white knuckle fast ride for entertainment, I want power and speed. That is where a modified Rhino performs best. If one unit would do both, I'd buy it as well. Now if you put one of the high hp snowmobile engines into an HPX, then you would have a true beast of a hill climber and something that would blast through the thick gooey clay mud. But, that may void a warranty...
