[TriLUG] Recommendations for a firewall machine

[Paul G. Szabady via TriLUG]

I'm looking to replace my aging firewall machine running ClearOS and was 
wondering if anyone had recommendations on hardware.  Preferably 
something small, cheap and quite.  :)  Ideally something that uses a 
standard (15P - C13) PC cord, SSD and no (or very quiet) fan.

Thanks in advance!
Paul