Rubble rock is the same as live rock, just small pieces. People put it in their sump or fuge to provide for good water flow in/around the rock. The organisms in the rock provide for biological filtration. Assuming you have good flow in your tank, putting bigger pieces in your tank provide for the same biological filtration.
Phosban reactor takes phosphates out of your water. Phosphates get introduced with food, among other ways. There seems to be a difference of opinion in the hobby as to whether a reactor is necessary. Another option is to just put some phosphate-reducing media in a mesh bag in your sump somewhere. Same with carbon.
"LS" is live sand. It has beneficial organisms living in it (like the live rock) that help with biological filtration.
I think a "sterilizer" is a UV sterilizer. I don't use one so can't give you any thoughts. I don't think it is a necessity.
No matter what someone tells you is right, there will be someone else who is doing the exact opposite with good success. So listen to everyone's advice and their reasons, and then do what you think makes the most sense. Here are my suggestions:
Use a sump, and design it such that some portion of it can be used as a refugium. In the fuge, chaeto (a macroalgae) and a 4" sand bed (also called a DSB") are helpful. Sump provides for more stability, and a cleaner look to your tank. Fuge benefits mentioned previously in this thread.
Use a skimmer. It does not sound like you are trying to do this on the cheap, so I will list some brands that seem to be well-regarded: Deltek, Euro-reef, ASM, AquaC. Get one that fits in your sump and fits your budget. Skimmer removes "dissolved organic compounds" form the water (aka crap).
Use live rock. At least one pound for each gallon of tank capacity (I think that's 90 in your case). Find nice big pieces: the biggest that will fit in your tank. That way you can make a nice open aquascape (lots of caves, swim-throughs, etc.). They cost more, but you will be glad in the long term. Live rock provides for biological filtration, preventing buildup of bad stuff like ammonia and nitrites and nitrates.
Use live sand. I suggest a shallow sand bed, 1-2", for aesthetics in the main display, and a deep sand bed in the fuge.
Get good lights. I suggest high-output T5's for you if you want to keep an anemone. Sounds like you already have a canopy, so get a TEK retrofit (or Icecap if the price tag does not scare you off) and install it in your canopy. Here's a link:
http://www.innovativelights.com/ret-t5-654.html
Get something for flow in the tank. Either a closed-loop or powerheads in the tank. If you want anemones, I strongly suggest a closed-loop. Drill your tank for one if possible.
Those are my thoughts, having been in your shoes about 18 months ago.
Read lots and lots and lots. On this board and in books. Hope that helps.