I am looking to get my first Reef tank and was hoping a few of you would have experience with saltwater aquariums. I have had a freshwater tank for the last 10+ years but I know Saltwater tanks are another level. 

So some of the questions I have:

Live Rock, Dry Rock, or the Manmade Rock?

Living sand or dry sand?

What are the mandatory items you need to have in your filtration system?

How to convert tap water to safe salt water for the fish safely and cheaply? Or just by Salt water from the Aquarium store.

Quarantine Tanks?

really any tips for someone getting into the hobby would be appreciated.