I purchased Bryce 5 also along with Vue 4 just because i had the money at the time. And I use Vue 4 completely. For a number of reasons: 1- The vegetation is simply awesome 2- The material editor is as simple or as complex as you want to make it. 3- Love the terrain editor (What more can I say :) 4- From what I have seen and I am relatively new to both these products (just a couple weeks) but Vue 4 has a much better render engine from what i have seen. 5- Get Vue why not it's only $199.00 :) and you get to hang with all of us here at the forum. A very helpful, inspirational and motivated group of people. Hope this helps!!