If I'm not quite mistaken there are 3 renderers available for MAYA. The standard built-in renderer, Mental Ray and Pixar MTOR plug-in.

Is this correct?

Currently I'm using the standard renderer, but It has it's limits. The motion blur is OK but it takes a decade to render it and make it look alright. But aside from the motion blur, It has no post production effects. 3DSMax has loads of post production effects (Film grain is one I just adore).

I haven't had the chance to try out the other ones, but if someone have some coments on those or other renderes that are available for maya, please let me know.