I have a x1000 firebox at the datacenter (load of crap) but I found that it doesn't actually need the blower fan on the CPU. I have ran it on a 100Mbps line now for over 12 months without that fan.
Arriving Thursday is 2 x watchguard x500's
Also maybe of interest Monday I should have 2 x Siemens HiPath 2030 VoIP / firewall / router phone / gateway systems.
Look interesting to mod the Siemens as they run Linux anyways and have 3 x LAN ports + 4 port switch integrated hmmmm
A Cisco PIX 515E that I purchased a couple years ago. I've been meaning to set up a lab with this plus the other Cisco devices I have but never got around to it.