leave your mobo don't switch to Asrock Extreme4 that's a bad idea read the last page of this legit review it's a flawed motherboard http://www.vortez.net/articles_pages/asrock_z77_extreme... The only negative I have for this motherboard is that it slips outside of typical ATX specifications. It’s 3cm thinner than a standard ATX motherboard and as a result may lack secure mounting on the far side since this isn’t a common size, which also means you should be very careful when plugging in the 24-pin ATX motherboard power – as the motherboard may flex.
If you plan on picking up a case at a microcenter store, you should also get the cpu from them. http://www.microcenter.com/single_product_results.phtml...
Will save you $40, which you could put towards a better HDD, the green drives are significantly slower. Might not be a problem since you do have an SSD, but the choice is yours.
Also, I'd consider getting an aftermarket CPU cooler, since you are getting an unlocked processor.
I'd change your primary HD. Even though you have a SSD in it, I would not go with 5900 RPM. Minimum for me is 7200, possibly 10k, possibly hybrid. While the upfront costs for a 10k drive this size may be larger, a drive like that will survive and surpass at least 1 major upgrade and be reusable as secondary or back-up down the line.