I'm running a 4670K on an Asrock Z97 Extreme 6. Currently I have a Hyper 212 Evo but I would like to overclock my CPU beyond 4.2 GHz. I would prefer air over a closed liquid loop which is why I'm not considering a Corsair H100i at the moment. My top choices at the moment are the Phanteks TC-14PE and the be quiet! Dark Rock Pro 3, I would also be open to getting another Noctua, but I would prefer to have a distinct cooler on each of my systems. I am also open to suggestions but would prefer to stay around my price range. I would also like a cooler with a dark color to match my Fractal Design Define R4 Blackout edition.