That is some of the most atrocious warbling I have heard in my life, especially on Horses In The Sky...I just can't picture ANY other voice working in that setting...I think if you put a "good" singer to that backdrop, it would lose something in translation...this is just how I listen to SMZ, of course, but the thing that draws me to that band is how every song sounds so mournful, and broken, and desolate...Efram's voice conveys that so perfectly. You couldn't be more right that he's terrible, but in context I think it's perfect.