Closed loop or power head - help

I have a 375g tank 8x2x3f tall. I can't decide on either going closed loop or powerhead like Vortech. I plan on doing a mixed reef. Help me decided what I should do. Are people doing closed loop anymore? thanks for any suggestions.
 
My tank is drilled for closed loop, but I have never used it. I imagine it would be much more direct than a vortech, but would be cheaper.

Mitch
 
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