Hi Chris
I am running a canster filter (eheim 2215) from memory with a home made light (120cm bulbs), in the near future would like to get protein skimmer but it is not completely essential at the moment as everything is running smoothly apart from the temperature (keeping that down). Combating that with a fan which runs over the top of the water and a chiller that my partner has also made (hes so talented)
Food wise i buy frozen mysis shrimp, i am growing brine shrimp and the occasional baby guppy.
They are pretty easy to look after and take up the same amount of time as my freah water tank. Minus side is that you have a saltwater tank that you can not decorate with coral, but there is some form of sea plants that you can put in the tank that can look really affective.