Sharepoint 2010 hardware configuration for Production environment

Hi,

I have to setup a Sharepoint 2010 production environment.

I have the following scenarios:

•5000 users with 100 concurrent users
•10000 users with 100 concurrent users
I wanted to know the following:

  1. What kind of farm each scenario is of, is it small, medium or large.

  2. What are the ideal hardware configurations for both of the scenarios.

Right now I am having only 2 servers, one for WFE + App server and one for DB server.