I have the ReefOctopus 150INT on my 100g - lightly stocked. Depending on bioload, might want to get a bigger skimmer. Also budget in good test kits, and a good refractometer. I use eheim heaters (if you don't want to do titanium). I also use a third powerhead (smaller, mine's koralia 450) to help mix my saltwater so you may need another heater/powerhead for your salt mix setup (I use a brute can). That way you can order just once 
