I have owned the Panasonic GS120 with 3CCD 10X opical and 200X digital zoom since June (from Buydig.com). Have had excellent results on the slopes and other places. The battery it comes with is very small and light and will operate the camera for over an hour of non-stop recording. Have done this to record instruction with the camcorder on a tripod. The tapes top-load so it is easy to change tapes and batteries without removing from tripod if necessary. Excellent color and good auto-focus response in my experience. In daylight, the electronic stabilization is adequate, but not as good as some of the Sonys. I have some great skiing video as I shadow other skiers, or capture on the slope. Low light performance is OK, but will result in strange artifacts if image stabilization is on in low light. Zoom is more than adequate and zoom rate is adjustable. Very hard for most people to hand-hold a camera on a zoomed setting to take action shots.
Downloading files to the computer is easy, and drivers are built into Win XP for this camera. Digital video files are huge. I have 4 - 200 GB disks on my computer running in RAID 0 and RAID1 with 1 GB dual PC4000 RAM, and 3.4 Ghz P4 processor. If you don't have a top end computer, you can get by, but will eventually want faster processor and more capacity to edit and render large files. The camera is cheap compared to editing equipment and software.
This camera costs nearly twice what the original poster inquired about, and is probably not what JeanMarie is looking for. The Panasonic uses Leica optics and produces excellent video. I am not familiar with the JVC. My parting shot (MilesB): dont use a digital still camera for motion video and sound; and don't use a DV camera for stills. It can be done, but you won't be satisfied with the results.