Thank you gecko.I use Final Draft, but not just for script writing. The last two version have quite a bit of Production uses, and FD is at least semi-compatible with most other production software. My daughter is a Live Event Producer and sometimes she uses it.
And if you make a sale, chances are you're going to be required to work in FD, so I strongly advise you to set your sights on getting a copy. When I hire a writer, they need to use FD. I buy it for them if necessary.