Unless your playing with your zune through a radio transmittor instead of dirrectly connected to your head unit, then that shouldnt effect how hard it hits
make sure you download your songs in 320kbs instead of 128kbs
its a huge difference in sound quality, and once you notice it for the first time, you start noticing it all the time
if you want some songs that sound sick with good bass in a car, these are the ones that come to mind first for me
relax and take notes - 8 ball & mjg
doubt me now (the song not the album) - lil wyte
bang bang - young buck
hypnotize - notorious big (sounds really cool with good subs if you can get the song in good quality)
water - frayser boy (badass song)
hydro weed - frayser boy and lil wyte
lets ride - the game
mr slow flow - evidence
enjoy lol