I just had a quick search and found this thread. I have been doing it the other way round; SU>Vectorworks
I have been exporting all the views I need from SU as DWG then importing them to Vectorworks in order to detail over the top of them.
I wish there was a more transparent way of having the whole model in VW, especially the colours and solid shapes, because it takes a lot of time to rebuild the drawing in VW.
I have on one occasion exported to PNG, which exports shaded objects as 2D faceted objects so the shading is retained, but I have had to import the PNG to Illustrator then export/import to VW... which messes up the scale
An example is attached... the images are just JPG exports BTW
http://office.amd.gb.com/~jason/BB_Cashdesk.pdf 640KB PDF