RX-8 Winter Tires

Hi Everyone! I bought my 2010 GT in the spring back when the weather was turning nice. Today I woke up to several inches of snow on the ground (I live in DC). I made it into work on my "all weather tires", which are a complete joke (if only I had read a few posts on this forum BEFORE the snow hit). It was terrifying, and I think I'm going to have to keep little zoomer in the garage at the office for several days now until this clears. Here is my question to the forum. I need winter tires (obviously). Any advice on which ones to get? Where should I go to buy? It seems like a lot of websites recommend just one type of winter tire for the RX-8, without any explanation of why that is the one to get. What am I looking for? I don't want to get ripped off on this one.. what do i need to know? Thanks for all your help!