Hello R Cubed,
First, it took ten and a half hours through the provided USB cable; can this transfer be done through firewire?
Your camcorder comes with a docking station, which, to my knowledge, features only a USB port - on the other hand, Firewire transfer will not speed up the process much.
You should, though, be able to transfer your files much faster. Maybe the excessive amount of time comes from your copying the UNIX files (you'll need to copy only the MPEG-2 files), but that's guesswork on my part.
After reading through several discussions, my impression is that I must first use "MPEG StreamClip", followed by an "MPEG-2 Playback" add-on to QuickTime
This is basically correct, but needs to be rectified a little: MPEG Streamclip
requires the MPEG-2 Playback Component in order to be able to convert your MPEG-2 files to DV format.
Are the instructions with SteamClip and MPEG Playback easily understood (I am a first-timer at this) or are there some tips I should know?
I do recall a help file (haven't used the app in a while), but the use of MPEG Streamclip is pretty straight forward. Matti Haveri is the local expert on Streamclip and you can find some of his advice here:
http://www.sjoki.uta.fi/%7Eshmhav/SVCDon_a_Macintosh.html#edit_convertMPEG
Is it necessary to purchase QuickTime Pro, or is there a significant benefit to having it?
While it is not necessary to purchase QT Pro, it's a good thing to have. Quicktime is a very powerful tool with which you can achieve a lot of things that iMovie just can't do (at least not without the help of third-party plugins)
MPEG Streamclip is not the only solution for converting MPEG files for use in iMovie. Here are some other options:
DVDxDV
http://www.dvdxdv.com/
DropDV
http://www.dropdv.com/index.html
DIVA
http://diva.3ivx.com/features.html
Toast Titanium
http://www.roxio.com/enu/products/toast/titanium/overview.html
hope this helps
mish