Knoppix
www.knoppix.net
Gentoo Linux
www.gentoo.org
Ubuntu www.ubuntu.com
Knoppix has been very useful at work, where I test computer equipment. It loads in a jiffy and can be customized if installed on the hard drive. The installation process is terribly complicated.
Gentoo Linux doesn’t have the ease of use but delivers mind boggling performance. The speed could make windows look like a tortoise.
My personal preference is Ubuntu. It allows you install the operating system on the hard drive; has a simple package management; and even has automatic updates.
Just download and burn the Live CD. And you are ready to go. If you need help post your contact details.