Are you sure Blender won't suit your needs?
A quote from their page...
"Professionals and others use Blender for:
Architectural/Industrial applications: Blender lets users create AND deliver superb photo-realistic animation - in convenient, compact files. It's ideal for walkthroughs. Worried that real-time 3D presentations will strain your budget? Enter Blender: Make models, design, and present interactively in your own product environment, and without straining budgets...."
It's not all meant for Loony Toons and games... might be worth a shot.
http://www.blender.org
