I'd have to say... I hate Bryce's modeller. I have no clue how booleans work. I much prefer Rhino over Bryce. But then again, I'm a very analytical, almost CAD-oriented person. I just like the concept of tri-view drawings, because it gives me alot of freedom to see my work from multiple angles as I work. I have personally never seen the Lightwave modeller, but from what screenshots and renders I've seen, it looks to be even better than Bryce or Rhino, much better. Now, for that 700$ to buy it...