It sounds like this will be your first tank so make sure you do a lot of research before deciding.
If I were to start up a new tank that size (i already have a 155 bow front agreesive fish only tank)
I would get 2 inches of live sand as my bed (crushed coral is a lot more work and a lot less filtration)
and a refugium with bioballs rated for around 180 gallons.
A mag drive or similar pump that runs about 1000 gph as a return pump (i have an iwaki but its too loud).
If you dont have the tank predrilled get a cpr overflow rated higher than your pump so u dont have to limit your pump. (its nice and quiet and looks good)
Live rock is awsome but costs ya more----if not a cauliflower coral or the type as decoration and places for ur fish to hide is necessary.
I would buy an in sump downdraft skimmer rated for 150 gallons. (get the ETSS if you can afford it---if not any kind of skimmer works about the same)
and power compact lites with half blu accitinic bulbs and half white bulbs
email me if you need more help...good luck
jon
jttranz@yahoo.com