25 x 9 x 12 Big Horns on ITP C-7 5+2 Wheels with 2" spacers on the rear only is going to serve you best...
The narrow Bighorns on the same wheels all four corners will simplify things for you...give you some added ground clearance (not sure about the copy cat tires but the original 25" Bighorns are really 26" dia.), toughness, and still keep your weight down to something reasonable...
Bighorns wear extremely well...extremely smooth ride...ITP makes some great tires...but none come close for the combined features that you need the most...
The C-7 is an extremely good wheel and very simple and easy to clean and the lug nuts are easy...I have driven many miles on the rims with shredded tires through the desert over rocks and at 20-30 mph for long distances and re-used those wheels...and the cost is relatively low...
I remember very well all you told me about who drives yours where and how and you can go to the bank with what I am recommending you...
ATVoutfitters (sponsor on this forum) always have everyday low prices and great service...
You can probably get free wheel spacers from dealership...not 100% sure about that tho...