RE: Marlin Model 60 .22
I have owned a few of them in the past. They are really great guns for the money. Both of mine worked just fine and were plenty accurate. With the right ammo I could get 1-1.5 inch groups at 100 yards with either of them.
They can be sort of picky with ammo though. And yes they are rather ugly, but they function well.
I owned a 10/22 for a while as well and the cheaper marlin was a better gun for me. It functioned better and was more accurate, for less money. However there is no limit to what you can do to a 10/22 as far as upgrades go. I personally feel the model 60 is a better gun "out of the box" though.
If you are getting a used one it can be toss up. It would really depend on how well it was taken care of by the original owner.
Paul