You won't hear much difference going in the same range level of gear. Your Pio will sound no difference than the NAD. If you want to hear a little bit of difference you need to look at players above the $1200+ or a different configuration CD player such one with a tubed output CD players.
For those who have "actually" tried to put their sub $500 multidisk players vs a $1500+ player and still said there is not much of a difference should get their ears and brains examined. Or the speakers they own are not articulate enough to convey that extra information.
