I voted for Will. I listened to his earlier entries and was actually really surprised at how much praise he got. I really wasn't that big of a fan of those, but I really like his rendition of Ikanaide.
Renril's Rinne Tensei was really good, as well, but I had trouble actually understanding her. This is probably due to the loud background music and the speed of the song, but it is what it is.
Side Note: I really wished you could seek when listening to the music. At times I wanted to listen to a particular section again, but couldn't without listening to it from the beginning.
Edit: A friend of mine pointed out that Ikanaide and Rinne Tensei might be edited and I think he's right. With Ikanaide it's a bit more subtle, but you can clearly hear some reverb in the latter sections.
Renril's Rinne Tensei was really good, as well, but I had trouble actually understanding her. This is probably due to the loud background music and the speed of the song, but it is what it is.
Side Note: I really wished you could seek when listening to the music. At times I wanted to listen to a particular section again, but couldn't without listening to it from the beginning.
Edit: A friend of mine pointed out that Ikanaide and Rinne Tensei might be edited and I think he's right. With Ikanaide it's a bit more subtle, but you can clearly hear some reverb in the latter sections.