How to Choose SQL Server Version?

Hi All,

I want to know how can I choose the Version of SQL Server 2012 with the number of connection?

I have read lots of information and this link maybe closest:http://msdn.microsoft.com/en-us/library/ms143760.aspx

But I really want to know the result in a simple way, such as if more than 1000 people will be access with the SQL Server, I will need to choose the Standard version.

Can some one give me the suggestions like this to choose the version of SQL server.

No code, No fact.