I am really pleased with my Schwalbe Marathon Supremes. Easy rolling, great traction on wet roads, excellent handling, no transition zones while leaned over, good weight capacities, do OK on packed dirt, do fine on gravel, do OK on gras if it's not wet, VERY FLAT RESISTANT, bright reflex sidewall, wearing very well, not cheap.

1.6" is llike a 40mm or above, so should ride pretty decently.....

I'd buy another set - wait a minute - I have another set in the basement.