You probably only need a CPU cooler. Personally I'd get either the Noctua Nh-D15(air) or Corsair H100i v2 (liquid cooling) for it. Both those will perform similarly, and will cool that CPU like a breeze. Maybe slightly more than needed at stock speeds, but you could have headroom for overclocking on it with that cooling.
I was mostly interested in what rating it has, bronze, silver, gold or platinum. If it's a 600w bronze unit that's over 5 years, I'd look to upgrade it, but if it's 3-4 years, and run like a normal computer it probably wouldn't be an issue. If it's gonna run like a server with a 24/7 load, working all day and never being shut down. I'd personally put in a platinum rated PSU there. Higher reliability, better quality components, and 2-3x+ warranty time. A gold rated PSU would probably be fine too, going for platinum would just be something I personally did. So I'd recommend Corsairs HX or RMx series, or EVGAs Supernova G3 series.
I also just saw it's a B85 motherboard, that means it canno't overclock the CPU. Are you sure it's the i7-4770k and not the i7-4770?