Been looking into pfSense myself lately but for use in an discarded C2D E7400 config. Besides the size of a real machine the possibility of expansion is way better than in that little box. Besides pfsence now have support for multicore cpu´s.
If you have some old spare comp unused why not try pfsense there before spending $149+shipping+powersource on something you´re not sure of!
As stated above i´m very sceptical that you´ll find it to be of "Plug-and-play" concept even if it´s preconfigured to a certain degree...
The only thing you need is a decent Intel dual NIC or better that you can get on eBAY for $23. There are alot to chose from.
http://www.ebay.com/itm/Dual-Port-P...279358?hash=item54339e83fe:g:95AAAOSwRgJXhIi1
The sw is free and the difference with the "gold" edition is just techsupport as i understand it.
You might want to learn some basics of pfsense and i´d recommend looking at thoose videos:
But if you decide to go throw with the purchase plz let us know what you think!
//NLCR