First off, Sorry but not making it today. . . .
Second I run the radial Iroks on my truck, and i have no complaints at all. I personally think you are asking alot to get 50k out of a tire and still get good offroad performance.
This maybe just a stupid idea to you, but since you have a dd/wheeler, this is just a suggestion. Why not save up some money get a good street tire and rim package either new or used, drive on them all week and maybe acquire an offroad only tire and wheel package for wheeling situations. It what takes an Hour tops to swap all 4 tires, and if you did it friday at work and used a lift should be quick and painless!!!!
I mean its wheelin, give alittle to get alittle. . . . the extra hour before you go wheeling would be worth the money you save in tires, and you would get better performance on the street and offroad:awesomework:
I know if i did what you did with your thats exactly what i would do, maybe alittle more money to start but you could get both sets to last for awhile:beer: