To be quite honest, the EVGA 750w (currently rumored for a 2018 release) is pretty overkill for the amount of hardware that can fit inside the A4. There are users running 7700k/1080 combos on a 300w HDPlex unit so the upcoming 400w HDPlex unit should be perfect for any seeking to free up some additional space.
While I too love the EVGA units (always been a fan of their warranty and RMA process), the SFX-L format isn't as easy to manage inside an A4.
However, a standard SFX sized unit like Corsair's SF600 makes things far easier to manage.