I've felt that any dual-core CPU that I've used didn't feel any faster than
my Athlon XP when getting around XP, but for starting up, shutting down, and
other programs that you use, it makes a big difference. (That would even
include WMP, etc.) I'm just saying the difference when using and navigating
through explorer for example is minimal. The next Windows is probably
coming out at the beginning of next year, so make sure you have a computer
that will run it. A good video card will be more important in the next
Windows (Windows Vista) than they have in the past. You need a decent video
card for the best appearance in Vista.
For advice, make sure you look in the following for your computer:
Dual-core is ideal for Windows Vista, so get one
512MB of RAM is the MINIMUM you should have for Vista, 1GB (1024MB) is
recommended, and I think 1.5GB of RAM or higher is ideal.
*If* the computer you get doesn't come with a video card (and comes with an
integrated graphics) make sure it has at least an AGP slot or PCI-Express
x16 slot available or has at a minimum 1GB of RAM.
I would recommend an 80GB hard drive as a minimum
Make sure you have at least a DVD drive
Now if you could care less about Windows Vista, don't bother nor worry about
it. Most computer systems that come with a dual-core processor would
probably work okay with Vista, anyway.