Well at 93lbs. for the Toyo 37s, (if I recall), I'd just get a tough Toyo 35 AT or BFG 36.5 AT.
I think even the 35" KM2 MTs are lighter than my 33.5" Toyo M/Ts, which are 73 pounds.
Take a look at Greg's tires, (know that you have but ...), not too aggressive looking [the tires] but
function over form.
I realize the Bajas might weigh in pretty high too, but there are still great tires available in 35s-37s, that are a lot lighter than the Toyo M/Ts.