I have now finally decided on the 265/75/16 KM2's.:D
Walked into one of the larger tyre supply chains at lunch today and they had 20 in stock (note where I live...). I asked about both 255's and 285's and they had 2 in 255 and 1 in 285 and I'll have to wait at the very least 2 weeks for more. Travelling around where we live that sort of wait in the bigger towns is just not an option and a complete no go in the smaller ones.
Therefore availability and LRA's warranty policies has turned the tide on the decision between 255, 265 and 285's. Wheels are scheduled to arrive either Friday or Monday and the tyres have been reserved!

