When purchasing hardwood flooring beware of finishes that are finished
in China, the finishes while purporting to have seven layers of "high
quality" finish, do not stand up to the advertised quality.
Due to this fact, avoid hardwood floors from China and buy Canadian.
Maple is the hardest wood so if it fits the budget - maple is an
excellent choice.
There is also the option of buying Canadian maple flooring unfinished
and finishing it yourself.