I've just done the same - upgraded, that is - from Poser 10.

Whenever I looked at the version comparison charts, I could see that most of the Pro features weren't really necessary for an amateur doodler like me. But I gave in for the 64 bit capability and hope to find the Fitting Room to be useful. The sale price also helped!

Much as I plan to stay with Carrara, I've decided to think more in terms of using pre-Genesis figures and to use Poser more. I'm hoping that the cloth and hair plugin being developed for Poser can be made to work in conjunction with Carrara. If not, then I'll need Poser Pro's 64 bits to create bigger scenes in that program.

Some fun and enjoyment ahead, I hope.