First, a complete set of specs on your existing computer would be most helpful. Tell us everything about it, including how the OS is set up. Do not forget to give full specs of your I/O sub-system, i.e. HDD's and how they are used, plus sizes, speed and controller type.
More details on the Assets (the files from your JVC) would be extremely useful. While we could Google it, you should have the complete specs on those files, and often a mfgr's Web site will be short in that respect.
Good luck, and with the info, someone should be able to help you,
PS for a laptop to do HD editing with CS4, you will want a minimum of 2 HDD's and 3 would be better. The GPU is not that big of a deal, but the CPU will be - faster, multi-core will be better.
The camera is listed as recording in AVCHD format, which I believe has a certain "folder structure" which must be respected for Premiere to use the files properly.
In that case a laptop just is not fast enough for comfortable editing, not even with 3 (e)SATA-7200 disks.
AVCHD editing on a laptop is not done.
While I might agree that Laptops are typically less suited to editing than desktops, and that using one not powerful enough can affect the smoothness of the editing experience, that should not have an impact on the rendered output, which can takle as long as it needs.
Thanks guys for the answer.
It looks like the DELL laptop that I have may not be a good system for this kind of work. I'm going back to the system that I have been using for some years (Windows XP, custom computer with Matrox). I will try editing on that computer and let you know guys how does it look on that system.