According to my calculations and the following website, the crash should occur at 10:31 PM on Friday night 9 Oct (Sydney time). I'm pretty sure this is right, but the east coast US appears to be on daylight saving, so I could be an hour out. The NASA site say 6:31 am Eastern time, which I think works out to 7:30 am Eastern Daylight Saving time (in say New York).
With regard to appropriate telescopes, the way I read the article in the Sydney Morning Herald, a ten inch telescope is the minimum needed to see the dust cloud which will be put up some 10km from the lunar surface. You wont see the actual impact with such a small telescope. See excerpt from SMH below.
"Amateurs need at least a 10-inch (0.25m) telescope to look at the crashes and what they see will only be a small part of their overall view in the scope. And they won't see the impact itself, but the spray of debris flying up."
Will the moon be in our night sky then ? I haven't checked. I plan to watch it on the net or on the tv news.