Parts look good, H77m is the mobo I have too.
I would just go for it and get i3 3220. From what I've read it doesn't seem like anyone is sure yet about which mobos the haswell chips will be on, but they say it could be lga 2011. There is no i3 on 2011 though. You could always upgrade later to an i5 or 7 later if you wanted. To me it seems like haswell will only be a minor improvement over ivy bridge, a "tick" instead of a "tock".