He is going to MC. There are no FM2 bundles, so it is cheaper to get a mobo+cpu+video card there - or the same price. And you'll get a lot more CPU out of vishera, especially considering the single model Trinity parts.
I would get the ASROCK Pro4 for the combo board. For $170 you are getting a very nice CPU and a board that's got all the bells and whistles you might want. It is ATX... I guess I use ATX in all my HTPC builds, so that's not a problem for me
It's nice to have enough CPU at hand that your HTPC can chew up whatever garbage files you throw at it without hesitation.
Don't forget Steam Big Picture
Of course, you can get a Z77 board and a i3 3225 for the same price, which is probably a better bet. Do you need to get Intel? No. Should you consider them? Absolutely.