course management systems

We are starting the processing of evaluating our commitment to our current LMS. We have done some informal surveys in the past but would like to do a real needs assessment to determine what system would best serve our needs - be it Blackboard, Moodle or something else. 

Has anyone gone through this process recently and how did you go about gathering input - surveys, focus groups, something else? Any advice or examples would be a tremendous help. As an aside, what did your school end up going with? 

Jason Mellen (Bowling Green State University)