Well, I have to wait some time before I can afford to upgrade to a better computer and THEN I can try to upgrade to P5, but I'm not sure that I'm going to, now that I found out that the "best" new features like hair & cloth effects are NOT exportable to other programs, and I will always do my rendering in Bryce, where I can build scenes with far more options in materials, lighting, etc. Now I'm hearing from people who went ahead and got it that it's even more "buggy" than anyone expected. So far I haven't heard much of substance to impress me that it's a must-have one must get as soon as possible.