Cisco Mars + Netscreen Firewall with IDS/IPS implementation

[<yury.vayman () verizon net>]

Hello,

I was wondering if any one implemented Ciscos Mars, Netscreen Firewall with IDS/IPS module and additional vendors in 
IDS/IPS space?

Presently, we have MARS and Netscreen firewalls and were wondering if we need additional product that would fill in a 
gap in securing our network.  

Thank you for the feedback.  

/Yury