Another plus of POVRay is that you can do network rendering with SMPov (www.it-berater.org/smpov.htm) , though I haven't managed to get the hang of it yet. Kerkythea is a great quality renderer and even has a MLT mode like Maxwell if you have a lifetime to use it. Unfortunately, you have to go the basic .obj import route and wrestle with the textures/materials.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken