Ugh, orchestral music, referred to as "the current scourge of gaming music" by Chris Remo in a recent Idle Thumbs podcast. The game looks great in most other aspects, but I sincerely hope they'll do something more for the music than a Hans Zimmer ripoff-fest. Not to mention that CoD4 would not let you turn down the music via a menu (hopefully there's a cvar buried in there somewhere; I haven't done enough searching).
Safehouse is my favorite level for setup and atmosphere. One notable attribute is that it has NO music in the level. I hope they do this for at least one level in MW2.