Carrara also imports quite a few formats, provided you have more experience with other tools. Of course knowing how well that will help depends on where you're starting out from.

It looks like Carrara has an ok modeling enviroment, but dedicated modeling programs such as Hexagon, Silo, or even Wings3D would provide more robust tools for that particular aspect. It wouldn't hurt to research them, provided Carrara's modeling room doesn't quite do what you need.

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Barbequed Pixels?

Your friendly neighborhood Wings3D nut.
Also feel free to browse my freebies at ShareCG.
There might be something worth downloading.