Well it sounds like you already had a saltwater tank if I'm reading right, so you know there's no such thing as maitenance free. Testing often is always a good idea, water changes, cleaning of filters or filter socks or skimmers.
I'm running a four foot tank. I have a sump with filter sock and an in sump protein skimmer. I have lots of live rock as well. I have a power head and return pump. Depending on what corals you want, you may need more.
If you want corals besides softies, than you'll need strong light. There was a recent thread on reef lighting where many people recommended taotronic LEDs. Very cheap considering their output.
The more heavily you stock, the more waste, the more maitenance you will have to do. Since you are planning on a reef, you are more limited on your fish options, but there are still A LOT of choices.
75 Gallon Reef