I have yet to meet a Marlin I didn't like, even though I think they are not the highest quality rifle around. They are an "everymans gun" which puts them in good stead with nearly everybody.
My choices would be ...
1) 39A, probably the finest lever gun ever made. The funny part is, I'm so particular I haven't found one that's in perfect condition yet. I gave the last perfect one to my stepson. I especially like the '70's rifles. What a rifle.
2) 39M, I have one that is one of my favorite guns. You just can't take a 39M out of the safe and not have fun with it, whether you shoot it or not.
3) 7000, the finest rimfire auto made. Cheap, accurate, well balanced, I'd pick it over a 10/22 any day, and I'm a Ruger fan.
4) 2000, I know it's not in production anymore, though I can't imagine why. I had one, and it would outshoot most any bolt .22 made, what a shame I sold it, and what a shame they're not still made, COMEON MARLIN !!!
5) 25m, another quality bolt rifle for the everyday hunter. Perfect, cheap and accurate. It's really a 2000 in hunting form, way to go Marlin.
6) 60, same place as the 25m, just an everday auto for hunting, nice gun.