By K-OS you mean "him" not "them" I suppose lol. Yeah he's been around for quite a while. I remember his first single back in the early 90's called Musical Essence and I've been a fan ever since.
hahah my bad them...yea they were at the warped tour...cause i was walking around and i heard somebody rapping and i was like where dat coming from, so i walked around and found them....there dj was using a laptop and a mpc-2000 it was pretty cool.