Open Source CMS Comparison & Recommendation Report

Hi, I am an Analyst programmer for a research organization. We want to replace our existing corporate website and intranet using an open source CMS Apart from our functional requirements below we need a system that is scalable enough to be easily extended to communicate with internal ERP(Peoplesoft & EBS) Packages and must be able to be easily extended by internal developers Our functional requirements are as follows Mobile extendibilty Support multiple channels SUBSCRIPTION SERVICES SOCIAL WEB CAPABILITIES PERSONALISATION AND PORTALS CONTENT SEARCHING COLLABORATION, ENGAGEMENT AND INTERACTIVITY ACCESSIBILITY AND PLATFORM RESPONSIVENESS OPERATIONAL MANAGEMENT INFORMATION CORE CMS FEATURES LDAP Integration I need a comparison of a few of the best open source CMS systems for our needs, including reasons why we should consider them and a recomendation report. Thank you Ryan