About once a year its fan dies... and it is producing too much heat (which means it is burning too much electricity).
So what I am thinking are the criteria for a new box?
In truth the device is just running ssh. I do not want to spend a lot on it... but I want it to be totally reliable (well... not reliable enough to bother with dual power supply... no fan goes a long way toward this).
I could just pull one of the spare 1U I have that chew little if any electricity... get a cheap flash/ide device.
Why not just spin up another virtual machine? Because experience is that Xen is still not completely reliable at this point. Updates have knocked all of my Xen servers offline before, so I have not drunk the kool-aid 100% at this point. I like my ssh server to be completely reliable.