Where can I find IT monitoring tool comparion like SCOM 2007, NetIQ, Whatsup Gold ?

I am looking for a tool for our IT infrastructure.  I was wondering if there is a document that I could read that compares SCOM 2007 with NetIQ and Whatsup Gold?  Or what should I do to get this document?
Or Is there anyone in this forum that could assist me?

We are predominantely a Microsoft shop. We have DMZ and trusted domain environments.

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i always recommend the pc magazine web site for comparison studies and reviews

search in teh review tab

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