ALIX.2D3 question

I just watched the pfSense video and I had a quick question.  If I buy the Alix.2D3 set up, will I have to install pfsense on it?  Or do I just plug it in and it's ready to roll? 

no you will have to install some OS in it.

I'm an idiot... I just watched that.  What's a good cisco dual band router Tek talks about?

to attach to the alix