The HDD camcorders do offer ease of transfer to PC.. and speed as well. they also offer the use of clips for quick location of scenes
The other advantage is that a lot of the time the clips are "dvd ready"
You never need tapes and you get more than 60-90 mins recording time
The disadvantage is that in terms of quality of video, they often never match tape at the same price point, editing ( if desired) is more likely to result in further degradation of Video quality,
HDD camcorders also have not as good low light and fast movt handling (especially panning: which TBH you shouldn't do!!

)
Tape camcorders need tapes. The transfer to PC with a firewire equipped PC is fairly straightforward but happens in real time and takes up 13Gb per hr
The advantage is that you do get better quality which editing does not degrade
You also get to control how you get to DVD although it isnt instantaneous
Saying all that Im a "tape" person( at heart) but am trying to be totally impartial hence the apparent bias towards HDD.
Im not at all enamoured with JVCs ( or indeed any Brands) Budget HDD range .but that is really very much a personal opinion
3CCD usually has the promise of better
colour not better low light. It is good marketing strategy when it work but be aware that there ae single CCD or CMOS camcorders which do similar colour but better low light.
Dont be swayed by paper specs
However it is not in doubt that Panasoonic do make good camcorders regardless of the technology used