thx loudness plus vs onkyo dynamic eq

[DonRSD]

after racking my brain i just decided to post
should i leave BOTH set to ON on my onkyo 806?

i notice that the thx loudness plus enhances the surround sound at lower levels

http://extranet.thx.com/technologies/loudness_plus.html

i just want to know if both should be on OR just one or the other?

i dont ever listen to my movies, videogames or music at reference, if that helps at all

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This is the description of THX Loudness Plus from their website: "With THX Loudness Plus, home theater audiences can now experience the rich details and ambient sound in a surround mix at any volume level."

This is the description of Dynamic EQ from Audyssey's website: "As you turn the volume up and down, Audyssey's Dynamic EQ maintains consistent bass response, tonal balance and surround impression"