I just spent $99 for a Digital Aquatics Reef Keeper Lite to control my lights and fans. Comes with a temp probe so in case my ac go's out my lights will shut down and protect my fish and corals. It comes in today.
+1 im about to order one today, i havent heard anything bad about them and they can be expanded to do so much more than just a timer. as everything in this hobby its nice to be able to add upgrades without buying a whole new system.