Love the vocals!
This is a great song- it's dramatic with out being overly so, which is helped out alot by the vocals. I think you did right by choosing more sombre almost sad vocals rather then the fast powerful 'ahh' vocals that some songs have. The only slight problem I have with them is that they... aren't 'clear' enough, for me, but this might have been intentional on your part or just how the music program you use makes them. The rest of the music goes well and doesn't leave you feeling bored by repetition at all. The 'climax' between 2:01 and 2:42 was good but still wasn't too climatic, but then again, you may have wanted this peace to be calmer then other dramtic songs.