Never heard Justice's remixes but they have good songs of their own!
Slim Thug - Thug
Have some music produced by Adrian von Ziegler, it's really quite good, if you're into dark music anyhow.
Semper cogitatio sum, de vita, de mundo, de omnibus, vivo et viva amo!
If you haven't seen this, it's been around the internet a while. A really emotional combination of a wonderful song and a powerful animation.
The Algorithm - Panic
I love the combination of styles in these guy's music.