With home protection being your main intended use, of the three revolvers you cited, I would pick the Model 60 with a 3" barrel. The longer barrel will add a little length, which will increase your sight radius, and the slight weight increase will help absorb recoil.
Regarding the 642, I would note that any very light revolver will be easier to carry, but at the price of greatly increased recoil. Since this would be your first gun, I would recommend against the 642 for that reason. If you buy something that is difficult or unpleasant to shoot, you will be far less likely to shoot it enough to become proficient in its use.
Here's another thought: For about what a Model 60 costs these days, you could pick up a Model 19 or Model 66. Those K-Frame guns hold six rounds rather than five, and are much easier to shoot with serious loads, even with short barrels. They come up for sale here on the Forum regularly, and I would suggest you seriously consider one.
Good luck to you!