I have to compare both these supervisors for a client
1) Sup 32 PISA provides for NBAR in hardware to limit bandwidth to P2P apps, skype, etc. However, they are currently using a proxy for internet service and plan to continue doing so and all these protocols are disallowed. Hence, I don't see a benefit there
2) They plan to implement VOIP on the network. Can someone stress on what benefits the PISA would provide over the 720 here?
3) The client also plans to use ACL's on VLAN SVI's and I think 720 does an equally good job as the PISA would. I may also provide the option of the FWSM and they can choose.
Apart from the ones I've mentioned, are there any considerations I should be making to choose the PISA over 720 with the assumption that the client wants to provide for the future hence a beefier backplane would suit better, budget not being a consideration.