Originally Posted by e-pundit
It's a hosting directory, am I right?
Yes, that's a hosting directory, which is supposed to help you in choosing a host, out of the listed Linux OS provided by valuhost.com, I'd go for Centos. But it's always good when a host provides a number of OS to choose from.
the choice of the OS depends on your site requirements, usually Windows-specific applications (developed with ASP.net) require Windows hosting.
In case you are still considering dediucated plans, check these: