Logstash and RabbitMQ

I read some post about using RabbitMQ with logstash.
So what best deplyoyment Model for RabbitMQ and Logstash ?
I have many Server (150GB log/day - > 100 Server), so i need load balance for logstash and for RabbitMQ ???

This webinar provides a good introduction and discussion around scaling Logstash ingestion using e.g. message queues.