I need real details on setting and choosing whatever it is I'm to choose.
You want someone else to tell you what it is you want...? How are we supposed to know?
You haven't given any details as to what you want your web server to do.
Is it just static content? or dynamic (e.g. blogs, newsfeeds, etc)
Who's designing the web site? (that will go a long way to dictating what software you need on the server)
Who's maintaining the site?
Where is the server going to be hosted? In your office? or are you putting it in a datacenter?
If in the office, do you have sufficient bandwidth in the office to support this?
In short, there are way more questions that need to be answered before you can determine whether Mac OS X Server is the right fit for you.