Cisco Equipments per layer

Hello Everyone,

This is just a simple research about the most demanding and most
selling equipments Cisco has produced. I just wanted to find out which cisco
equipment you are using on following layers,

Edge Routing:

Core:
Distribution:
Access:

Your feedbacks are valuable for me and many others to develop understanding
of architecture and features of these devices, kindly write the series names
in order,

For example:

Edge Routing: 7200

Core: 6500
Distribuition: 3560
Access: 2900

I also want your opinion about Cisco Configuration Assistant and how helpful
it has been in performing fast configuration.

Sincere Regards,

-- 
Khurram Noor
CCIE # 24419
http://www.linkedin.com/in/khurramnoor
Blogs and organic groups at http://www.ccie.net