which crm systems work best for Event Management scenarios?
It depends on your event management needs. At Batchbook, we have a nice integration with Eventbrite that makes sharing info between event manager and CRM pretty easy - http://batchbook.com/integrations/eventbrite.html.
I think the key is knowing what contact info you want to track for event invitees and attendees, and how you want to use that information for follow up. If the CRM offers custom fields and integrations with event management and email service providers, that's a good start!
Event Management has certain steps that need to be adhered to for smooth execution. A system that can help you map, design and monitor all those steps would be useful. Of course such systems should allow the flexibility to COMPLETELY design/redesign the process elements (some allow partial flexibility). This might fit the bill http://www.bpmonline.com/insights/crm