Thanks for the replies. When I decided on modo, 9 years ago, c4d was my first choice but i could not justify the expense. Modo offers everything that i need and more for a reasonable price --- though it got a lot more expensive in the ensuing years --- but its price is still not anywhere near as much to buy or maintain as c4d. At this point, I am settled on modo and rhino for conceptual work with modo and maxwell as my two main render engines because they're very complementary. Though I think highly of c4d, I do not want to get into the expense or the learning curve if i can avoid it. I am experimenting with the best way to export from vectorworks to go straight into maxwell studio. The other option that I'm reviewing is exporting from vectorworks in the *.fbx and *.3dm formats, opening in rhino, and then setting up cameras, adjusting lighting and materials, and then exporting to maxwell.
For some reason, so far, i've had some difficulty with the camera export from vectorworks to maxwell directly as a collada file type. fbx>rhino>maxwell seems to be the best workflow so far.