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We never get tired of answering questions around here
even 100 times in a row. Though we are likely to just drop you a link to the previous answer rather than retype most of this stuff.
Looks like a good lineup to start. I would suggest the Coralife skimmer.
Unless your tank is reef ready (pre-drilled for plumbing) then you are going to need an overflow kit to drain water into the W/D sump. The pump you have selected may or may not be sufficient. I do not see any specs on head loss listed on their page. Mag Drive pumps (
see here) are very good.
You will of course need the necessities: Heater, Test kits for Ammonia Nitrite Ntirate pH Alkalinity Calcium Phosphate, Thermometer, Hydrometer or Refractometer, pH buffer, Calcium supplement/Alkalinity buffer, a few buckets of salt mix (I would recommend Reef Crystals), and a few things that I would strongly urge getting since you are considering corals would be
an RO/DI unit, Kalkwasser, Gravity fed dosing system, reef supplements such as CoralVite CoralAccel PhytoPlex etc.
Lighting is really going to depend on which corals you are going to want to stock. The lights you have picked out will be sufficient for keeping easier specimens and soft corals, but for Acropora and other light hungry corals you are going to need a bit more than that fixture can provide you with.
If you plan on a coral reef setup in a 55 gallon tank then I will warn you up front: don't plan on keeping more than one or two fish, if any at all, until you have some experience under your belt. And Angels, Triggers, and some Butterflies are definately out of the question in a reef tank. Reefkeeping is relatively easy until you try to keep both corals
and fish. Then you can have a challange keeping your tank in equilibrium. Best to develop the necessary maintenance and husbandry skills first.
I would suggest you start off with some basic information to get you started with the planning phase:
Cycling=
http://www.fishtankforums.com/saltwa...-aquarium.html
Quarantine=
http://www.fishtankforums.com/saltwa...rocedures.html
Acclimation=
http://www.fishtankforums.com/saltwa...livestock.html
Feel free to ask any question on your mind. We are here to help!
tank advice needed 
