I've been using Poser since P4 (currently using P6).  I've played a little with Vue, 3DS Max, and am pretty good with Rhino.  Seeing the price on Carrera 6 got me thinking about giving it a try.  Is it worth it?  Is the rendering engine that much better than Firefly?  is the interface pretty user friendly?  Will it wash and darn my old socks for me?
Any input and advice would be greatly appreciated!