BO Upgrade 4.0 to 4.1

Hi Team,

Currently we are upgrading our BO server from 4.0 to 4.1; we are using the APACHE TOMCAT server version 6.0? Please suggest if I can go with this or its better to go with Apache Tomcat 7.0, Please refer any good read about this or any specific reason.?

Thanks

Rishav