Core i5 3570k > get the ivybridge cpu, it's better than the sandybridge i5.
ASRock Z77 Extreme4 > good motherboard for the money, it's better than the asus LX.
Gigabyte 7950 or the 7870 tahiti le, the performance difference is minimal.
Noctua NH-U12P > if you can't fit in the budget, look for the cm hyper 212 evo or arctic cooling freezer 13 or i30.
XFX Core 550 > get this psu, it's a quality one.
Corsair Carbide 300R > good quality case, much better than the cm case