I am evaluating VoIP systems for a new office space. The hardware and cabling will be brand new and to specs for either system. What are the pros and cons (preferrably from someone thats already been down this road) to each of these systems? We are expecting 30 users (telephones) to begin and one location scaling quickly to 100 users and three locations. Specific questions I have: 1) Can the Avaya system process the calls quickly and process voicemail-to-email instantly like the Cisco Integrated Messaging? 2) Is their any gotcha's with either of these systems? 3) We have a solid Cisco VAR and service provider. How important is after the sale availability in real world production systems? 4) How do the WiFi phones (802.11b) and Polycom IP Conference phones work? 5) Is there any questions I should be asking? Thanks in advance for your help!