Did you try Audyssey first? Audyssey reference is often preferred for movies (rolls off the high frequencies some), flat may be preferred for music (aims for a flat response across the frequency spectrum). Many like to use Audyssey's DynamicEQ at lower volumes. You can also customize the eq curves with the Audyssey Editor app (you have to buy that for $20 from an app store).
No one can tell you what will work with your speakers in your room particularly, tho, let alone know what you mean by "neutral" (to me neutral means a flat response so I'd try Audyssey first). When you use the graphic eq you lose the ability to use Audyssey, too, fwiw.