Latest published papers on IPS brands evaluation and comparison

["Hamid . K" <elite_netbios () yahoo com>]

Hi list.
I'm looking for latest released papers and reports on 
evalutating,comparison and ranking ,covering available IPS brands .
I used to read some papers comparing top 5 brans like 
ISS,SourceFire,Dragon,... but need fresh reports .
I'm sure I missed some published ones which you'll mention :>

regards
Hamid.k

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