You can OC the 1600 with the stock cooler. Won't be any record setting OC by any means, but it's capable.
The Shadow Rock 2 will work also - just make sure you get an AM4 bracket for it. Newly manufactured units may ship with one now, but if it's an older stocked item.... you have to order from be quiet! http://www.bequiet.com/en/cpucooler/446
What does the rest of your system look like? What kind of OC are you hoping for?