One of the problem with Animation Master is that it's hard to learn and master it, from what i've heard . Carrara is really easy to learn, especially if you used Raydream, Infini-D, Bryce and Poser ! And because you're a user of RD and I-D, you'll get a good discount for Carrara Studio ( $149 ) . Well, i'd suggest to go for Carrara : you'll sure use it for some stuff and if it's not powerful enough for your needs, you won't lose much money . litst