Reasons to use Linux or Unix:
1. Better reliability
2. More Software Supported
3. Free Open source software
4. Better control panels
5. Faster web pages
6. Apache Web Server
7. Perl Support
8. Frontpage Extensions ( Yes, they do run well on linux or unix. )

Reasons to use Windows 2000:
1. Use of Asp ( active server pages ) + dll files
2. Existing webpage designed in asp or for the windows platform
3. Perl support via activestate ( less support for modules )
4. IIs internet server needed

If you are building a website from scratch, we recommend you do hosting on the Linux/Unix platform.