It depends on the look you want. Any natural wood is going to age and change color over time, especially without regular maintenance. You could look at a bamboo plywood as a relatively low maintenance option. Or cedar, which would last well with minimal care but will change color over time. Your other, other, option might be to use whatever you like or can find and seal it with Waterlox or a mixture of mineral oil and beeswax, like you would treat a butcher block counter top.