The best linux distribution

What is the best linux distribution for this computer?

Have tried PuppyLinux before?

http://www.puppylinux.org/user/viewpage.php?page_id=1

When I said it required 128 MB of RAM, I wasn't being exactly clear. What Puppy does is loads itself, most of the contents of the CD, into RAM, so that they are faster and don't have to be loaded from the CD. The interface is designed to be somewhat similar to Windows 95. I've never installed it to a hard drive, but it should be possible, and from there it would be even faster.

http://www.puppylinux.com/hard-puppy.htm