I'm a vocalist of the death metal variety but im not sure of what style of gutteral vocals i should addapt...
a - 'The Bleeding' Chris Barnes style
b - 'Tomb of the Mutilated' Chris Barnes style vocals
c - Suffocation style vocals
d - Mobid Angel style vocals
I think they all sound pretty cool but i can't make up my mind

choose the one you like the most. if you cant decide, keep thinking until you do. dont have the internet pick for you.

Go with your own style, you can take influences from these vocalists, but you don't want to copy them! It is a form of expression, be unique, and go with what fits you. Whatever that may be.

Butttttttt.... Morbid Angel

Do them all. More versatility as a vocalist will give you a much better chance of being recruited by a band.