My opinion if you are looking for a professional solution for partial design you have to check SENSIBLE Technologies,they are specialized for this.I have a friend in this company if you want i can give you his email address.
The only complaint I have heard against the Sensable design software is not about the software at all but against the haptic input device they use. Some people will not put in the time to acclimate to it.
The 3Shape software is playing catch-up in some areas of functionality, but their development team is agile...