Former Wank-Nova 10
When I often hear people ask what is the best anime/manga they ever seen about 90% of the time its either Fullmetal or Death Note, so between the two which do you think is better in both Manga and Anime.
FMA is very good but nowhere near the best manga/anime ever.
The first half of Death Note is definitely a god tier level of manga and some of the best storytelling of all time. The second half aka everything after L's death is pretty much shit though. The first half of DN is above Monster or 20th CB, the 2nd half is more like Naruto-tier rubbish.
Between the two I must say Death Note is better though simply due to how amazing the first half was.