Planning a new tank

[mothership]

Longtime lurker, new poster here.

So I'm planning a new 150Gw/ sump FOWLR tank. What I'm looking at is what sort of filtration system to use with it. I was looking at having dual phosban reactors going with activated carbon and a robiphos which is only good to 150g, however I was also looking at a zeovit system.

cost is important, however I'd like the ability of converting the tank to a reef tank in the future. One important factor is that I want the lowest electrical consumption as possible.

Do I have any other options (I want to avoid cannisters) for this?

I'm months away from actually setting up the tank, however I'd like to get as much planning done before hand as possible.