You've got an average mobo (4+1) power phase and the PSU is fine, not top quality but not bad either.
Due to the weak power phase, I doubt you'll see high OC speed with a 6300. However, a moderate 4.3-5 maybe doable. Just keep an eye on the VRMs temperature.
I don't know what you have for GPU, given that you're not CFX or have a 295x2, then you'll manage.
Get the Cryorig H7 or H5, if they fit in your case.