Mainly xm right now (thanks to my free 3 month sub with purchase of my $30000 plus vehicle), though my ipod is always in use in my car...
Most music today sucks so I RARELY buy anything anymore... good thing with well over 1000 cds I was tired of wasting my money on albums with one or 2 decent songs...
to fill in the gaps in my music collection I resort to other methods, even doing so when I dont feel like digging through all those cds for one song...