I'm looking for a network monitoring tool, that can give me information regarding traffic across entire network, as well as helping to check for bottlenecks. The tool should also be able to monitor individual computers, their drives, memory CPU usage and other stats. If possible it should also be able to analyze my network to determine if it's suitable for VOIP deployment. Currently I'm using then Solarwind's Engineer's Edition trial software, and it provides a lot of the information that I'm looking for. I also downloaded Observer 11 from Network Instruments, as it's supposed to have a wide range of VOIP tools in addition to the above mentioned requirements, however the $3,000 + USD price tag is a little too steep for me. If I need to use more than one tool for this I have no problem with that. Any suggestions would be greatly appreciated, as I'm looking to try and deploy VOIP in a test environment in the next couple of months (provided the network can handle it).