I have the brs heaters (2x 200) connected to their controller which is in turn connected to my reef pi. I read good things about the heater brand. Controller not so much but the reef pi will keep an eye on it.
I was going to use eheim, I loved them for my daughters freshwater tank, but for the wattage In my basement I need they get very long. I am using the eheim 300 W I got for the salt water bin.