new reef tank advice

Ok...I have narrowed down some pieces of equipment to set up my new 55
gallon reef tank.

The things I do know I need and will be getting a

60 to 70lbs live rock
Precision Marine HOT-1 protein skimmer
2 Hydor Koralia circulating units
Proper lighting level for corals and maybe one anemone

Now for the part I don't know. I was considering a canister
filter...someone advised against that.

I thought about a refugium, but my only reason for doing so would be algae
control, but I don't know if I want to mess with all of that.

So besides the live rock, the skimmer, lighting and calcium based sand...is
there anything else?

Would someone recommend a canister filter? Is a refugium a must?

Or will the things I have settled on so far do the trick?