I wonder if you could put the pumps on timers to reduce power consumption during certain times... I doubt you'd recover the cost of the timers anytime soon given the pump's probable low power requirements, but still... or to decrease wear and tear...
The other nice thing is redundnacy. My skimmer has one huge eheim recirculating pump on it, when the needle wheel went, the entire skimmer was down, I had to pony up cash I really didn't have to spend $$$$$ on a new impeller since it couldn't wait.