HOB Overflow Box or Out Pump?

[Midway]

Hi there,

I am in the process to build a sump for my 80ish reef. I just want to keep as simple as possible. I'm thinking just having a pump that takes water out of the main tank and a return pump in the sump. I don't like the idea of having a HOB overflow box. If I go with the out pump and return pump, do they have to be the same gph?

Or what are your advices to keep it simple?

Well, the tank is a tempered glass so drill is not an option, the tank is running anyways.

Let me know your thoughts.

Manny