At 170lbs,on my Big Dummy,with about 40-45lbs of gear,I run my 2" BA's at 55fr/60r. Rides good. Below 50 on the back I can feel it get wallowy.
As I said in the other thread,you should play with the pressure to see where you like it the best. No tire can give both a plush ride and sporty handling.
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C'dale BBU('05 and '09)/Super Six/Hooligan8and 3,Kona Dew Deluxe,Novara Buzz/Safari,Surly Big Dummy,Marin Pt Reyes,Giant Defy 1,Schwinn DBX SuperSport,Brompton S6L/S2E-X/M6L-X/S12 T Line