Server/network device monitor software suggestions?

[Jim Slattery]

I'm looking for a solution that will allow us to monitor many servers from many 
different sites.  Looking for Event log triggers/alerts first and foremost, but 
any other information that could be gathered would be great as well.
 
I'm not looking for free, but GFI Events Manager is more expensive per device 
than my managers will allow me to spend.  Open source would be awesome, but 
management is willing to spend some money on a solution.
 
I appreciate any ideas or suggestions!
 
Jim 
~ Finally, powerful endpoint security that ISN'T a resource hog! ~
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