from a hard-drive based camcorder to your computer because it is not real-time import, but a drag/drop copy.
Editing, rendering and burning to DVD will take the same amount of time - this is the computer working to render the video in the computer and burn the video to the DVD and are unrelated to the camcorder media.
The only place in the last paragraph that might improve would be the rendering time - but that is CPU-bound... faster CPU = faster rendering. We don't know what computer you have today, so it is not possible to estimate what a new CPU might do for you.
If you go with a hard drive based camcorder, you can have a similar archive on disc, but that step happens later in the process rather than up front in the miniDV tape video capture process. If you choose not to archive from a hard drive based camcorder, and just delete the video after transfer from the camcorder to the computer, you will have saved time - and you will have no archive. When all is said and done, my guess is that there will still be a marginal time saving in favor of the hard drive based camcorder process - with little degraded video quality.
Are you coaching high-school volleyball? Is there an visual arts or multimedia class or individual student interested in learning to capture, edit, etc... that might do the job?
I'm a volleyball coach and am constantly doing video analysis of our matches. I currently have a SONY miniDV camcorder which does a nice job of capturing decent quality video. What I do find to be a pain is archiving and finding all the miniDV tapes I use to capture matches. And in order to get the video to my PC for editing, it's real time importing (1 hr video takes 1 hr to import). And, to surf around in the match, I gotta fish through the tape.
I'm considering a hard drive camcorder to speed up the import to PC process and to make it easier to record more video without tapes... and also to burn the video to DVD faster on my PC's DVD burner. Any thoughts on my application and whether it's worth it to go the hard drive camcorder route right now?