Thank you for the reply upstateny. I personally like Inter-Tel. I think Inter-Tel has all the features that we need here, but I think the owner want something that look more up to date with different looking phones. For me that's not a reason to change the whole system. I mention the new Mitel, but his mind is set for a new system.
This question is for a different office. What would be a good phone system for a 7 users office?
Basically any and all systems will do the job for the most part. Your needs drive the decision making. Do you have remote employees, road warriors, multiple offices etc are the things that will help you decide what is best.
Where is the office physically located?