Enterprise level firewall selection

[sumeet_nagar () hotmail com]

Dear list members,

I am looking for comparison of different enterprise level firewalls and was wondering if you could help me with that. 

I am sure someone has done such a comparison based on effectiveness, performance, throughput, price, other features 
etc. of leading vendors (Cisco, Checkpoint, Netcreen, Symantec, Cyberguard, SonicWall etc.)and I am just not able to 
find it one the web. Would someone be kind enough to point me in the right direction?

Thanks so much!

Sumeet