Heatsink or not??

[bubbleradish]

Intel core i5-4670K
Msi Z87-G55 INTEL Z87
G.Skill Ripjaws X series 8gb (2x4)
Samsung 840EVO 250gb
Western Digital Blue 1tb
EVGA GeForce GTX 780 3gb Superclocked
Define R4 Blackout windowed
XFX PRO650W 80+ Bronze
Corsair AF120 Blue x4

What is the best "bang for your buck" heatsink for this build. Do i even need one? Could i save some cash by buying more corsair fans for the define r4?

Thanks

And i made most of the components blue (mobo, fans, cpu, ram) to give it a nice glow inside the r4

 

[clutchc]

If you are going to overclock the processor, you must have a good quality after market cooler. The Cooler Master 212 EVO is about the best for the buck air cooler.
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103099

 

[Vic 40]

For ten dollars more is this my pick,
http://pcpartpicker.com/part/xigmatek-cpu-cooler-primesd1484
it could crowd the first ramslot.Look at some reviews.