Which one, 216 watts or 432 watts? There's a $200 difference I also need RO water... and I have no idea whether they sell it at my lfs or not. It'll probably be better to buy a system in the long run. Another $300.
If you want a 55gal you are going to need more then 1,ooo
I myself am setting up a 2o gallon and it will cost me a grand but that is every thing.ro/di,tank,stand,lights,cover,heater,pumps,tests,fish,coral,clean up crew you name it i have it.
You can still set up the 55 but try joining a local reefing club and getting things second hand from them.Also diy can save a ton of money.