I like low-powered scopes mounted low over the bore. The gun balances and carries better, plus I get better stock contact with my cheek looking thru the scope. Here's my choices. All my Marlins use low Kwik Site rings with either Weaver or Kwik Site bases.
Bob
Marlin 336 .30-30, Weaver Classic 2.5X
Marlin 336SC .30-30, Lyman 3X
Marlin 336MX in .308 Marlin, 4X Leupold