Do you live by a microcenter?
Anyway, the mobo... maybe an ASRock Z68 Extreme3 Gen3? It would satisfy your needs... and it's reliable, while not costing all that much.
RAM: Is it DDR3-1600? CAS9? 1.5v or lower? Make sure of all three.
GPU: I'd go with an MSI Twin Frozr II OC, but seeing as how they're unavailable, Gigabyte is good too. ASUS would be nice... but it seems to be fine
HDD: Make sure it's 7200rpm
Case: Don't know much about it... look into a Corsair 400R
Heat Sink: Hyper 212 Evo, right?