Well your existing setup does have the flaw of fronts being closer than the picture image which will take away the pleasure of the big screen and sound both from you, once implemented in this manner. I can think of two three alternatives and you should decide based on the decor and other furnishing aspects that you want to place in this room. Always remember HTS are for our pleasure and not the other way around so a balance is always advisable unless you have a dedicated room for the HTS.
Option A
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Keeping your existing setup, mount the fronts and center on the Screen wall. Might want to shift the screen towards the fireplace wall.
Option B
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-bring the projector screen forward, just behind the fronts.
- Move the projector back accordingly along with the Sofa.
Option C
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- Use the green area for the screen and the rest of the equipment placement according to it.
Option D
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- Use the brown area above the fireplace for the screen (depends on height of fireplace, you dont wann get neckpains) and the rest of the equipment placement according to it.