If you know Bryce, and know texturing and animating in Bryce, then go with Bryce. If you know Max, and can texture and animate in Max, than go with it. I recently had to do a 30-second animation in Max... It wasn't fun, mainly from the fact that I had limited experience in Max. It did, however, render fairly quickly. It may depend upon the timeframe. Bryce takes a long time to render, whereas Max renders are often quicker. It also depends upon which package you are more comfortable in. Good luck.