Temp controllers are over priced IMO. If you are going to shell out that much cash then get a controller that does more than just turning on and off a heater and or fan. Thats why I chose my RK, it allows me to control my lights, temperature and delay my skimmer for X amount of minutes when I hit the feed button. It can also be programmed to shut down any channel(s) you want during feed time and or night mode. When Roger had me set up his system I chose to go with the RK2 and now that the firmware upgrade is complete on the product IMO it holds it's own pretty well in the market place of controllers. The next firmware upgrade will give it data logging capability from what I have heard. Plus the adition of the mutliple switching programable relays are a must for anyone running a Kalk reactor.
That said when I set up his 265 Reef next year, it is being planned to be among the most elaborate reef systems in this state. We are going with either a Neptune of AC so I can control and monitor the tank remotely while he is away.