Multi-media friendly Firewalls

[ReedD () HQISEC ARMY MIL]

I have a customer that will be standing up a new group and is looking at
implementing a firewall (yea !!).  However, they do have a strong
requirement to support VTC capability (H.323, T.120) streaming video,
real-audio and the like.  Luckily there are definite end-points external and
internal to the firewall that will be used to create the firewall rule sets.
What I need to know are what firewalls (proxy and stateful) that are
multi-media friendly and can handle these protocols with the least amount of
difficulty.  If anyone has any experiences good or bad using mutli-media
protocols with the Cisco PIX, Lucent Brick, Axent Raptor (NT or UNIX), TIS
Gauntlet would be appreciated.

Don Reed