Thumbs up.
I've always enjoyed this type of music when grinding, I usually try to stick to instrumental stuff too.

This kinda music makes me wanna kill people. Maybe, it would not be to bad a grinding song after all. Still...this is a heads up not a takeing-the-head-down site, yes? Just wanna make sure :>

Instrumentals are always good for grinding, My favourite is jaar's essential mix; kinda chill/progressive 
http://www.youtube.com/watch?v=SyGjkuysdvc

Im not sure if music that needs focus to listen, like jazz or classical might be good for poker . I think that chill out, reggea, soft rock are better to keep u focused playing poker and tilt-free. But maybe that works for me.