For myself, and for others who are already video hobbiests (particularly if you have dozens or hundreds of hours already on tape), i'd say move right into the 1TB hard disks and start dumping your DV into the drive dedicated to video. 1TB should hold around 75 hours of video. Here's just one of a number of large affordable drives:
You can start dumping immediately, but don't forget that it takes real time to dump the video in... so 75 hours of raw video (which i recommend you WATCH as you pour it in), commands maybe a full season of evenings and weekends to get onto your disk. This is not an inconsequential task. You also might want to log this material as you pour it in and watch it. There will never be a better time. (*Particularly as many video packages will disregard the datacode on the tapes that includes time/date stamps, so you had better notice that information as it goes into the computer and make a note.)
Once you have a big hard disk, if you have the money, i'd say go ahead and get an HD camcorder that recorded to memory sticks (8GB sticks are about right). A lot of new camcorders are coming out these months, and honestly, i'd wait as long as you can here... at least until these new models have been hammered on by folks, and perhaps wait until these come out in 2nd editions. I'm going to get the big hard disk now but move a little more slowly on the HD camcorder. I want it to be small & light, easy to use, and move video easily into my editing applications. Here's a new model from Sony I'm keeping my eye on:
(here's some news on the soon-to-be available camcorder)
and I'm constantly weighing the pros and cons of this one, perhaps more sweet than any others i've seen...
(here's a review of the TG1 with good information)
With big hard disk and HD camcorder, you're ready to move into your next phase of videography. Keep your old MiniDV tapes as an archive for your old material. And your next purchase might be a second TB disk to back up the first (perhaps a RAID of some sort), but take it one step at a time, and see how you use what you get. That's my advice today.