Not sure if available in 275 80, but for me the most tempting tire in 275 75 is Firestone MT2.
It is a new, supposedly state-of-the-art MT tire, it has 3-ply sidewall in LT-C and weighs 47lb same as my SL Wildpeaks.
But it costs nearly double my SL Wildpeaks in 265 70 and I highly doubt I will get any more miles from the MT2s even if the start at 18 vs 13/32 for the Wildpeak.
That and the Cooper Maxx have caught my eye as heavy duty offroad tires with some on road positives. I would expect the Maxx to last longer than the MT2, probably a lot longer. Discount Tire has the MAxx as 51,000 median mileage from their store data. They do not offer the MT2, however. LTC KO2 is 59,000 miles median, P265 70 Wildpeak they have at 54,000.
There is no way I will keep mine for more than 30,000 (I would not use them under 5/32 offroad and under 6 is pushing it). Right now I project them at between 25-30,000, up from 22-25,000 as wear has improved. To get to 30,000, I need to get 1/32 per 6,000 miles from now on, which seems doable but who knows.