Hi Gray.
My advice is to “force” your friend to edit one project together with you and Vegas. Based on my experience this convices everyone.
Here in Germany nearly no one knows Vegas, no client, no director (and unfortunately no freelance editor 😉 ). But after working with us on a project especially people with experience in other editing systems do not believe how fast you come to a result.
The first cut of this commericial:
http://www.thirty-seconds.de/Element.html
took us one hour for example. Try this with Avid.
We do not invest in Avid any more. We have one office equiped with Media Composer, Adrenalin and XPress and I hate it to see how circumstantial it is to work with them and how long it takes to achieve a result that needs a few mouse-clicks in Vegas. So, in our new and second office we only work with Vegas and are happy with it, apart from the fact that Vegas 8.0 does not support Decklink cards at the moment 🙁
Good luck
Thomas
Thirty Seconds Filmproductions, http://www.thirty-seconds.tv