Q: We are installing 1400 sq. feet of 3/4″ X 5″ wide maple prefinished flooring. Would you recommend using a stapler or nailer?
A: I prefer to use cleats. If you have a misfire with a staple, I hear they can be a pain to deal with. Cleats hold just fine.
Follow-up Q: Is a cleat the same as a nail, and if not can you rent a cleat applicator?
A: Yes, a cleat is similar to a nail. They come in strips of 100 nails. See, for example, the web site for Powernail.