Some more info on the OST:
It appears that you get some awesome thing that goes on top of your key (pic below):
4 more songs have been added to the 2nd disk. The Sound of Truth, Discommunication, CRAWL, & Far Beyond Blackened (Reprise).
Oh, & Rush Level 10, plus the calender pages for November have been released. Atoms & 凛として咲く花の如く.