For TV I usually use PL2-Music, because it doesn't collapse to the center quite as much as PL2-Cinema (particularly on programming that is not encoded for Dolby-Surround).
For serious music listening, I use stereo. For background music when I'm moving about the house sometimes I use 7-channel stereo.
I've found PL2 and DTS:Neo to be pretty disappointing for music. PL2 takes the air out of the music, DTS:Neo seems thin in the bass/midrange, and neither images as well as stereo when you're sitting in the sweetspot listening to a well-recorded CD.
