Ugh, I hate the CTHD music. I can't say I think it'd make a bad OA soundtrack, though.
Anything I think of typing here is the kind of thing I just KNOW some Japanese major will sweep in on with "Actually, blah blah...", but I'll voice some ideas. There must be CDs for Japanese and Chinese operas. I think Taiko drums (that's the word, right?) would be great for building suspense before a large battle. If you can find soundtracks to movies like Once Upon a Time in China and assorted period films (not unlike CTHD), you'd probably do well.
Playing "I Think I'm Turning Japanese" is not advisable.