I love my KO2s. I have 30k miles on them, and I expect to see another 30k. I've had them in mud, snow, ice, lots of rain, etc- they've never let me down. Other than the fact you'll always be surrounded by the same tires on other rigs, I love em.
My buddy and I were out playing in 2'+ of fresh powder. He has a 2016 JKU Rubi on 315/70R17 Duratracs, and I'm on the same size KO2. He actually got stuck- even locked fr/rr- when turning around, and I had no issues- even open fr/rr. For the record, his Duratracs are a good 15k miles newer than my KO2.
I'm not claiming it's only the tires to blame, but it does say something.
[MENTION=135317]rkntoy[/MENTION] has STT Pro in 37", and he's not 100% happy with them. I don't remember what he said they sucked in, but i think it was either rain or snow.
I love my KO2. I wish I didn't love them so much, 'cause I'd really love a more aggressive tire. I'd also love a tire that ran true to size, but oh well. For example, a 37x12.5 is the biggest KO2 made, but I'll bet it's closer to a 35" than a 37". My 315/70R17 is "33.4" according to BFG, but was only 33.5" BRAND NEW. Same height on the vehicle or off, and that's with 42PSI.
Also, careful when talking about/comparing load ratings and sidewall ply's. The load range E KO2 is not a 10-ply, and the tire in load E weighs the exact same as the load C. I've heard many times people talking about the "heavy load E..." "...get the lighter load C..." etc, and that's not necessarily always accurate.
Tire technology is evolving, and its not as straight forward as it once was.
Edit-
I didn't address wheels. As others have said- make CERTAIN whatever wheels you do get are HUB-centric(106mm bore), and the lighter- the better.
The higher the backspace, the better your handling and tire fitment will be. Your wheel bearings will also last longer. There is a limit- don't go over 5" backspace.