personnaly I think a controller shouldnt be used to 'control' everything, if anything happend everything shuts off. I like the idea of a controller for lighting and temperature, fans etc. but the redundancy of other independent controllers for heater/chillers, and others for pumps all on difference circuits makes a much more secure and disaster proof system
aquariumcontrollers.com give you alot of information.
for 7 beans I would get an RK2 and the left over for an independent ranco for heat/chiller and have some left over for a night on the town.
lots of choices and lots of opinions, do whats best for you.