I find audio quality on the Play Music app to be not so good. I don't know how HTC does it since there don't really seem to be any settings to really change sound levels but it's about the best sounding app I've used on any device. The Amazon app is nice also. Seems like Google put all of their resources into making a Jack of all trades app but forgot what we really use it for.
Armadillo, the other white meat.