Monkey,
What year is your HD??? I keep trying to figure out what tire to go with in our '13 HD. Having 20's makes the selection harder though!!! Have considered, but don't really want to change rims if I don't have to.
Keep us posted on how the tires do please.
Last time I bought a set of tires it came down to between the KO's and the Cooper A/T3's. A/T3's won based on saving over $200 (may have been almost $300, can't recall for sure!!!), and a 50k or 55k mile tread warranty... Was very happy with how they performed in all conditions, except I never tried them in mud. Everything else they were great. Leaning toward the A/T3's again, but would like a slightly larger tire than stock, that is what is making it tough!!!