Been lurking for a little while...
Picked up my new 2020 LTZ Durmax a couple of weeks ago, but I have been waiting for the wheels to come in. Just got them installed.
Wheels are MKW Offroad, 20X9 with +25 offset and 285/65x20 tires. Pics below of the SLIGHT poke. I appreciated the pictures posted of various offsets to help me choose how much offset to get, so hopefully these will help someone else.
In addition to the wheels/tires, I have added Rough Country step bars (I chose these because the steps drop down quite a bit...and my wife is short ? ). Also, toneau cover and bed mat. So far, liking the truck very much.