Hi msj,

Back when I worked as a Jeweller, I purchased R4 & V-Ray for Rhino as a Render Plug-in.
Having MoI, I've rarely used R4 for my modeling, except when needing something like "CageEdit".
Basically I now use R4 to allow me to Copy & Paste my MoI model, so I can render it with V-Ray.

And now Rhino & V-Ray are both due to be upgraded...

To upgrade both R5 & V-RfR just to do renders, well I'll buy SimLab Composer as a stand alone program for a lot less!
I don't make jewellery any more, so rarely have I found the need for using "CageEdit" when doing my current models.
R5-x64 would be nice, but I've rarely created anything so complex that I've absolutely needed it.

...personally I can't see myself upgrading either of them.

But I WILL be upgrading to MoI V3

HTH, Colin