I wish you could use my slim shady remix but noone's made an audio version yet, it's pure text with 2 people considering making it audio'd atm ;p But yeah, hard rock wouldn't work well with a non-action vid, but that doesn't mean avoid upbeat music either...Gorillaz and Daft Punk have some nice repeating-without-driving-you-nuts beats(Feel Good Inc, Dare, Harder Better Faster stronger(The latter in particular REALLY fits multiboxing if you think about the title lyrics and how it applies to us ;p), maybe close with One More Time, etc