Here are some kick @$$ songs that have some hard hitting bass and amazing beats.
Bar 9 - Midnight
Bassnectar - Boombox (bassnectar Illgates Remix)
Bassnectar - Blow
Bassnectar - Cozza Frenzy (Mega Bass Remix)
Bassnectar - LSD
Those are just some of the songs I like. They have some other really good songs as well.