120 gal reef tank

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As far as the euro-bracing, as far as I understand that is a glass perimeter brace all around the inside top of the tank, is that correct? Wouldn't that interfere with any plumbing you wanted to bring in from the back of the tank, such as a closed loop?

I wanted a 75 but I have read many posts saying a 120 gives more front-to-back depth for aquascaping. A 6-foot tank would be my ideal but too hard to move, so a 120 will be my compromise.

As far as buying a 120 from Inter-American or Seastar, is there any advantage to going with them versus All-Glass?