tomcat/apache/iis

I have been developing a small web application in tomcat, and I am about to deploy it. In my development environment I just had tomcat, and did not have any web server (apache or iis) in front of it. This application is going to be deployed in a small office environment (5-10) users for the time time being. My question is, should I configure tomcat to run behind apache or iis, this question is purely in terms of performance. What option would give the best performance.
Thanks in advance and look forward to your inputs.

In your small office environment, I would go for simplicity. Just use Tomcat - it is plenty fast enough for all but the highest loads and Soooooo much simpler than configuring it to work with IIS or Apache.
Bill