Architecture : Help Appreciated

I have just installed Nagios to play. Very excited.

Scenario
Have 4 offices with less than 100 nodes on each. Windows machine are present therefore going with 2 box approach (agentless). All of them are connected with t1 backbone or better [that’s what I have been told].

  • What is the best enterprise scalable solution here? Anyone who has deployed this; please forward email so that I can ask basic questions so that not to waste time of experts.

thanks