I agree that they need some white or something in them. I do like the pop of them up there though. Gives it more texture. I like the white rim idea though, might just have to do that.
A raised placard with a logo between the grills would dress up that area.
Hmm, I think that's a good idea too. I'll have play around with that idea. I see what you're saying.
Not sure that I'd paint the edges of the grills white. Might be a bit much since it's so close to the edge.
A logo stenciled on the grill itself would be cool.
I envision something like the attached pic for between the speakers.
(limited to ms paint and logos swiped from the internet here at work)
It would be really awesome if it were 3 dimensional, like a car emblem.
Just throwing my opinions and ideas out there; your vision could be different.
Edit: Hmmm....A rectangle with rounded corners that match all the others used in the design might be a better fit.
....going back to my own projects now.