I have about the same clearance above my center channel. (119 in Da-Lite, and Sony PJ) I use a gloss black center. I really don't think it's an issue. When you dial in the PJ, to fit the screen, there really shouldn't be any direct light from it hitting the top of the speaker. What you do see on it is reflecting back off the screen, towards you, which shouldn't effect your picture.
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