When I'm in your situation I avoid music with lyrics - they tend to distract me from the reading and comprehension.
If you like DJ Encore, then trance is the way to go.
It's old, but Christopher Lawrence's Trilogy, Part I: Empire gets progressively more intense and the beats hit harder the further you get into the mix. It zones me in and sets a relentless pace where I feel compelled to finish whatever I'm doing by the time the CD's over.
Anyhow, music's subjective, but for some reason this mix really helps me focus.
