Cog is great! I'm on OS X 10.4.7 on a macbook pro, and this just kills iTunes! Less is more, and simplicity is king!
I use Cog to output lossless audio to my external DAC, then to my tube headphone amp, then to my Grado SR325i's, and the whole thing sounds insane!
Thanks for leaving out the silly 'sound enhancer' and clippy EQ 
They sucked in iTunes!