Mark has ( as usual ) covered it well
but
That leaves question 1 Mark......
Baz1.. "Best camcorder" is
One which is within your budget.. which you haven't stated
Does what you want
For fast moving images You want a good MiniDV SD model..
For Transfer to PC quickly you want an HDD or Sd flash card model
The problem with Hi def MiniDV models ( HDV) and HDD/ Flash card ( AVCHD) is that when light levels are little low auto focus can hunt .. a bit. This is not a problem in good light but a combination of low light and fast objects is challenging (Eg inddor go karting.. ect)
Futhermore regardless of Definition ( HD or SD) , HDD and SD flash card models are a little less good at taking fast moving objects some worse than others However each model has to be judged on its own merits
As such there is no "best" . Anyone you get will have some area in which you may have to compromise . a little Youll have to decide how little that matters
As for software: any of the current NLE software titiles will do what you want, the preferences are down to what you feel youll find easy to learn