You could just set a scene on the view you're working on then spin the model as you wish and when done you can go back to exactly where you were with one click?

Vertex, Vector, yes, those
Oh, well that's not great news, I thought I was onto something there. I guess I'll have to revert to my other software.

It would be a really good feature to have in future though...

Is there any way to get the hidden lines to display in the following cases?

1. On insertion into a Layout doc, in Vertex mode
2. On export to a vector graphics file (pdf, eps, DWG/DXF)?

I've tried all the things I can think of and I can't get it to work.
i.e. In SU, I set up a style with back edges etc. and I can see it fine.
Screen Shot 2012-05-02 at 16.32.31.pdf