We have shifted to over to AWS, it turned out the easy part was shifting the servers, the hard part was moving our collective mindsets to leverage what AWS are offering and not code for the LAMP stack on the server / EC2 instance in the traditional way. Luckily I have a very good friend who is a great technical architect and will explain things for the price of a beer and lunch. We are getting there but some of it has made our collective heads spin.