I can't seem to find much amazing DGM fanart on Pixiv, either. >.o There is a D.Gray-man Search, but I just found it recently so I haven't done much browsing yet.
The manga is quite epic, yes :D My library has a bazillion volumes, so I don't have to read it all on OneManga for once.
I also watched a few episodes of the Macekre version of the anime, but it got me kinda confused 'cause of all the names 4Kids changed. @A@ It's like, "Hey, that guy who calls himself Trey Racer sure looks a lot like Horohoro..."