Hi Sophia, i have been working with VW and rederworks and it works very good for my work and client. I have a small firm and they are satisfied when seeing their project develop before their eyes. I have exported to cinema 4D. Maxxon but i could not yet do a decent presentation. although on its own it has a better resolution and is an animation program.
Exporting dxf is possible, but you need to do some home work.Renderworks can do the Job; see http://www.dynamicsystem.aw/Architect.html