Nurbs are not dead! I think they could be on their way back with the announcement of T-Splines <- Google it! They seem to give you the power of Nurbs and SDS. As for Hexagon V Silo. I think I would prefer Silo. Hexagon has some really cool tools (that many others dont have) but what I do not like was the Amapi hang ups it has. Tools need to be validated, and sometimes what is going on is not quite clear.There is just too much interface in the way! I have not used Silo properly (only fooled with the demo) but the vids I have seen do look very cool. The topology brush looks amazing. Wings 3D is great. I think to really appreciate its beauty, you must use it hotkeyed as the right click menus do occasionally get cumbersome. I must say the most impressive thing about Modo is the slick marketing! It does look like a really cool app but the people marketing it make me thing that this thing just landed from distance outer space 2000 years from the future!