Which linux distro is the best for programming?

I have an old pc Pentium 4 with Intel motherboard. I need a linux distro to be installed for programming purposes and also to learn more about system programming. It should be good for programming C, C++ & Unix. Should I get a debian, rpm, gentoo / slackware based? kde desktop would be preferable. Thanks in advance! show more I have an old pc Pentium 4 with Intel motherboard. I need a linux distro to be installed for programming purposes and also to learn more about system programming. It should be good for programming C, C++ & Unix. Should I get a debian, rpm, gentoo / slackware based? kde desktop would be preferable. Thanks in advance!
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