Well it depends on shaders but on my setup, it takes me about 1-2 mins to render on low quality and about 9-10 on very high settings
Im using just a main skylight and using a hdri for reflections.
Excuse the bloom effect that was done in photoshop but this is the render i done.
http://img.photobucket.com/albums/v2...ca/2Bloom2.jpg