Jebao WP10 or Koralia (240gph) on nano?

[GoFish]

Looking for some advice.
I have a basic rectangular nano tank that I just built and all in one chamber on. Dimensions for the water in the display are 14.5" x 11.25" x 11". Total water volume in display section is only 7.7 gallons.

The overflow is a long oval slot that measures 5"x 3/8"

I don't think the overflow will handle a wave very well, the water level is only 1/2" for the top and its rimless, so if I go the Jebao route it would only be used on a steady mode.

I want a powerhead that's small, no wave, and provides enough flow so that detrius doesn't settle on the bottom... It's a bare bottom BTW.

Anybody have experience with both that could shed some light on advantages or disadvantages?