I dunno, you never know until you try. I've seen plenty of servers that are popular use after game music and it seems everything works out fine. It's just the sound levels you gotta keep in mind. Of course though there WILL be at least some person (no matter how loud it is) who will try to pull the "oh i cant hear music to loud lululululul fail adminz" card or something.
(also sorry if this is going off topic :s)