I am looking for a good 3rd party software that will work well for Monitoring and Performance in the AWS- EC2 Amazon Cloud for SQL Server 2008 and 2012 databases for multiple different customers that our company would monitor each of our customers SQL Server databases. I know about both IDERA and Red Gate, but I was wondering with both cost and ability to monitor many different customers SQL Server databases, what would be some of the 3rd party software I should consider and why? What is everyone else using?

Thank you...