I really like the THX settings. It does make it sound more detailed and gives more of feeling like you are in the Theater. I have 4 Axiom M-80's
2 in the back, 2 in the back, Axiom QS8 for my side surrounds and VP-150 for my center channel. and Sound Related Tech. Subwoofer which has a water bladder in it allowing it to go down to about 8 hz as far as bass output. you feel this sub even more then you hear it