Film/Video Editing

We are currently putting the finishing touches
on a film entitled
Birth of Innocence

I use Sony Vegas Pro 9.
Why?
I can work as fast as I can think.
It's completely non-destructive.
I can actually work in resolutions up to the 4K max
It has native support for pro camcorder formats like Red and XDCAM EX

It's the only NLE that allows opening of multiple iterations
and cutting and pasting from one iteration to the other, and:
from wikipedia:
Vegas was the first NLE that allowed users to put a variety of formats on the timeline and just edit them.
Other NLEs would require the user to render or "conform" these down to a single format.
Vegas Video 1.0 had this in 2000. Final Cut Pro got this feature in 2007 with FCP 6.
Native 24p editing was first made possible in Vegas; more than a year in advance of the competition.
In 2003 when the 4.0b update was released, Vegas users got HD editing support and 24p support for free.
Vegas was the first NLE with "serious" audio tools,
such as integrated 5.1 surround mixing, 24-bit/192 kHz audio support, and ASIO driver support.