Hi,
I also recently purchased a Phenom II 920. I happen to be partial to ASUS boards, thus they were the first place I looked for a new mobo. I finally selected the M3A78 Pro (see http://www.asus.com/products.aspx?l1=3&l2=149&l3=639&l4=0&model=2270&modelmenu=1). It looks like this will give you everything you need to make the 920 do its best work, and it was only $99 at Tiger.
Tony