So far as I know (I haven't watched the anime), the anime is an exact adaptation of the manga.

I do like people struggling with morally ambiguous power - it's part of what attracted me to Death Note. I just need more to keep me wrapped up, I think. Part of the problem might be that it was over a year between me reading the first 7 volumes and the last 5.

I'll let you know about FMP!; I've just started about 5 different shows, so I know if I took it now, it would be forever until I got it back to you.