I also mostly use Vue 4 rather than Bryce 5 these days. But Bryce 5 is very pleasant to use once you understand the unconventional UI, whereas Vue drives me up the wall with its sluggish interface and poor design. True, Vue reads a pz3 and Bryce doesn't, but I end up having to do major retexturing in Vue anyway, because it doesn't read reflective or bumped materials properly. But Vue is FAST when it comes to rendering, and that's the crunch issue for me right now. It may all change when Bryce 5.5 comes out.