I spent many hours with the cost calculator going through with our support company trying to find a _rough_ estimate of what our bills would be compared to Rack

I spent many hours with the cost calculator going through with our support company trying to find a _rough_ estimate of what our bills would be compared to Rackspace. It's not easy initially but things like http://www.ec2instances.info/ http://www.ec2instances.info/ definitely help.