BGP Looking glass and monitoring

I'm interested to know what tools everyone uses for the following: Looking Glass server. BGP Monitoring BGP Management, ie. cost/preferred path management. Does anyone use tools to make changes to configurations? For example svn. How do you push changes? Manually, approval process, scripts? Currently the only thing we use is subversion to track changes in configurations. Now that we are up to around 20 routers and growing we are looking for better methods to manage our infrastructure. Thanks guys! -Bret