You actually cycle with the live rock. Put in the rock and sand and then fill with saltwater. The die-off from the rock will cycle your tank. Th only way to know is to get a test kit(api reef master kit is very good choice) and check your parameters(ammonia,nitrite,nitrate) you will see ammonia first,then nitrite, then nitrate. Get 2 heaters that combined will have enough power to heat the tank(set them at around 80 degreesF). I say two because if one fails you have a backup. Have the powerheads in the tank while it's cycling. They help move the water around. Aim for 10x the tank volume turnover.
One thing I see you didn't mention is a protein skimmer, if you have live rock, a skimmer is a must. Help remove stuff called doc
-dissolved organic compounds(waste that turns to nitrate). This is one piece of equipment that you will not want to go cheap on. And get the biggest one you can afford. Octopus and cpr are great brands.