I got these at
www.xoxide.com for $35 + around $6 shipping, during one of their xhour sales (every sunday from 9-10pm EST). They are very heavy, but great for games when you cant have you speakers on. If its just for music, definitely get some lighter headphones!
As for the bass, its acceptable for headphones, but really nothing compared to a nice 5.1 speaker set up.