SPS, mixed, softies, fish only?
SPS dominant you will likely want more light. Typically you want heavy flow for SPS which generally means 50x capacity at a minimum with 100x capacity being ideal. (50*38) = 1900. So two Nero 3s at 4000gph total capacity should be great. That gives you the capacity you are looking for and a realistic 50x flow when pulsing which is great as well.
Mixed reef the light you have is sufficient if you put more demanding SPS higher up and in the center. Your less light demanding corals will be fine just about anywhere. Two Nero 3s is more than enough.
Softies and fish only are going to do great with the Nero 3s and the AI light you have.
What you may not like is the fall off on the light since it really isn't designed to light a 24"x20"x20" tank to the edges. If you keep this setup just know that the par on the edges of the tank aren't going to be great and it may not be bright enough visually in those edges. I would try it before upgrading or adding more though.
