i use the Audyssey "Flat" curve, since my room is treated and if i didn't use "flat", the high frequencies would be weak and lacking.
"flat" is just right to my ears.

careful setup like this is what permits me to listen to movies at around 0dB without cringing; it's like in the cinema, wide, crisp, clean, smooth and "natural".

i listen to the music stations on Galaxie at around + 2dB; this gives me a realistic level on those stations i listen to.

See: http://www.blu-ray.com/community/gallery.php?member=Gelli
or: Axiom Gallery