Killzone 2: What tracks would you play In-Game?

Following on from the recent announcement from Seb Downie that custom soundtracks is indeed a possibility for online play in Killzone 2, I ask this question: What track will you play while blowing off heads during online matches?

When asked during a Q&A session, the QA Manager for Killzone 2 had this to say when quizzed about in-game music: ”“Only for multiplayer via the XMB. In Single player the music is designed to match the action so it would be hard for us to mix up your favourite boyband.”

So that is a direct quote from the man himself, quite exciting actually when you think about it. The question is though, would you opt for some calming, soothing music while you cause havoc online, or would you prefer to go all out and go for the heavy rock / metal option to add to the atmosphere? Let us know your thoughts!