Do you want to go cheap or spend a little?
If you have a window, the Wraith Prism with RGB is quite good, if it gets the 2700X under control, so it should for the FX6300, the Wraith is compatible with AM3+ boards, at least it fits my AM3 phenom and you will find it very cheap on the used market, sometimes even not used at all!!
If bling bling is not your style any AM3+ compatible tower cooler with a 120mm should do the trick, and for no more than 10 to 20.
If you want to spend a little, Noctua Redux brings Noctua performance at a lower price, if seen some Redux models as low as 30 to 40€.
The Englishman