another vote for the 705's.
I laughed when you talked about riding across your yard, they suck in wet grass
I ride about 50/50 unimproved road / black top. Work good for both location for me.
I also would not want to run them in deep mud, but I do see slime coat on some of the dirt roads early in the morning and they seem to at least be predictable.
I am about to put on my 2nd rear.
But I would not run them on my Dirt Bike