This question comes up about 3-4 times a week, minimum. Just use search. I mean, come on, man... Half of the people wanting to build a hackintosh are using it for media programs like Logic.
At any rate, check the July Builds page. There should be a new one coming up soon for August, but it probably won't differ too much. The CustoMac Mini Deluxe will work fine. So will the CustoMac Pro. They all will, really.
An i5 3570k will be fine. I don't think i7's add much since their biggest pro is HT, which Logic doesn't really take advantage of. Someone correct me if I'm wrong.
16 GB of RAM, the biggest SSD you can afford (256 GB with a 1TB HDD will be great), a GA-Z77X-UD5H for a large computer or a Z77-WIFI or whatever it's called for a smaller build.
Then buy an external sound card. Don't get an internal one. Focusrite Saffire or Scarlett, a 250 dollar one. You'll be set.