The FX 6350 box cooler is better than the FX 6300 cooler. It is similar to the FX 8350 box cooler with copper base and heat pipes and a high RPM fan.
The good news is the FX 6350 will OC nicely under a Hyper 212 EVO air cooler. The Hyper 212 EVO air cooler will also out perform the H60 and still be quieter. So if you go liquid cooling I recommend a Zalman LQ315 or 320, or a Corsair H80i or better. Anything less is a waste of money.