I used Meshlab, Atangeo (not needed), 3D Coat and my historical CAD package, Shark FX9 with the new PowerPack Pro module.

I don't have the choice others have being on the Mac platform, as well as it's a for fun exercise, but if I was on Windows, I reckon Rhino, 3D Coat & T splines plug in would do very well. The difference is this a a 2K not 10-20+K budget, as I am not a student (in education) more of a tinkering hobbyist.
There's some great AutoDesk, and Solidworks stuff out there that is cheap for students, as well as Creo 3 & Geomagic, and then the dedicated scanners with reverse engineering software. I also reckon the hardest part is learning the conversion processes, and although this part is too simple to waste all this effort on, it's a good test because of the hard edges.

Hope this helps
Mike

Anybody else recommend good packages?