Not sure about the brand, but not all systems need calcium reactors or chillers. As far as the chiller goes, it depends on the temp of the room it's in and what components you are using, and how much they heat the water. For instance, if you are planning on using metal halides and you don't run the air conditioning very often, there is a good chance you will need a chiller. If you use LED lighting and love your house freezing cold in the summer, as I do, then you won't need a chiller.
The calcium reactor is a preference thing really. You can keep a healthy, thriving, reef by keeping the water as close to natural sea water as possible. Some do it with frequent water changes, some with dosing trace elements as needed, and some with calcium reactors. All can be quite effective.
