I need some help here. Last time I touched a 3D app it was Maya 3.0 (well unless you count the frustrations of working with Maya PLE versions). I’m pretty sure from what I’ve read here and there on CGTalk that most modelling apps can export to a variety of formats now. So, I’m guessing that modelling can be done in any application. But we may have difficulties with rigs, lights, and rendering differences.
So, I guess we need a vote on application for these tasks ASAP.
When this project was floating around the Mod forum, it was suggested that Maya and XSI were good choices with MR. Kaydara format was also mentioned at one point, but I don’t know what they were talking about.
Discuss here … make a decision that the most people can work with. Some people may be left out due to software issues. I’m sorry. I wish I had an easy solution.

If that’s not going to work out let me know.
