1: dont get a h77 mobo when you have a k chip. get something like the asrock extreme4 z77 for the i5
2: Do you plan to crossfire later on? if you do, get the xfx 650w core edition. they are made by seasonic and are great power supplies. it is also cheaper than most corsair power supplies which are also made by seasonic. if you are not to crossfire, the 550w model will do you fine.
3: i prefer the antec 302 over haf 912 but its your personal choice.
4: might want to throw in a hyper 212 evo if you want better temps and overclocking with the k chip
Thanks. Your post was exactly what I needed. Looking forward for more feedback from others!