I can second the Marathons being "sons of female dogs" to put on, they are on bike #1 Which means the Marathon Plus, which are the cycling equivalent of tank threads, must be that cubed
Bike nr1 has a bike shop built re-inforced DT Swiss rim and now happily carries 20KG of toddler, bags of grain and other assorted heavies. It's a bit of a bother to start and get it up the hills though
Schwalbe just doesn't seem to make bad stuff, the Hurricanes sound good for when I need to leave the roads. I found the slicks are fine on many roads...in the dry however. Wet mud...hm...not so sure...