As Unis alluded, the less compression the better. Personaly, I rip at 320 which is the highest bitrate possible. I am a bit of a snob with music- don't like low bitrate stuff much
(My portable players do not support any of the lossless formats)
Whenever I can, I use a CD player and high quality headphones. But if I am traveling or going to a park, I am willing to go without the holosync- Paul is a fine hypnotist, and his products, though certainly enhanced with holosync, are great without it too.
vitaman