I had the same choice a few weeks ago and went with a NIB Marlin 60. After about 300 rounds no failures with CCI Mini-Mags. It's also surprisingly accurate with the factory open sights. I was considering installing a Tech-Sight peep sight but based on the accuracy of the factory open sights I don't think that will be necessary.
"We will do this: we will hang together, we will keep our organization, our arms, our discipline, our hatred of oppression, until one universal shout goes up from an admiring age that this Missouri Cavalry Division preferred exile to submission, death to dishonor".
General Joseph O. Shelby, CSA (1830-1897)
The only Confederate General who refused to surrender himself or his 1,000+ "Iron Brigade".