i am totally not satisfied with Maya's built in render system.. thinking of getting Pixar Renderman or Mental Ray.. i know there is a thread on this but cant find it....
which one of these do you think i should get...

Pixar Renderman
Mental Ray

i can afford the 4000$ price tag of Renderman... but i think the brazil renderer is for 9000???? and is it available on maya??

who has used the brazil render?