Get one with a simple idiot switch on the pump housing so he doesn't have to do any special wiring.

The cost of a 2-speed will pay for itself before you know it. Low speed is quiet, money-saving, efficient and capable of doing everything but vacuuming and backwashing. It can run twice as long and cost 1/3 as much to run that long as the full speed.

You will NEVER regret installing a 2 speed pump!