It will be fine with 1333 Mhz RAM
You can also get a 6300 and overclock it yourself . The 6350 has a better cooler but that is the only physical difference . The price difference might be worth it for you
pcpartpicker.com
The psu wattage you need will be determined by your graphics card more than the processor .
Your graphics card is important to power usage too so I would have to guess