CPU/Case Cooling Question

[jadf]

I decided to build my own computer this time around. I'm not incredibly well versed in PC parts, so I had some help from a friend. My PC is used mostly for work (Microsoft office type stuff), streaming, and the occasional game (nothing heavy). My question is this: do I need to replace my case and/or APU stock fans? I went with a budget build here, and my main goal was longevity. I've noticed the APU runs at 55 C normally, which apparently is expected with AMD processors. I have two options picked out that fit the budget, but I want to ensure they're going to be worth the money or even necessary before I buy them.

My PC
Rosewell Challenger U3 mid tower case (two 120mm fans and one 140mm)
AMD A10 7850K Kaveri with R7 integrated graphics APU
Corsair CX600M 600w power supply
Gigabyte GA-F2A88XM FM2+ motherboard
G.Skill Sniper Series 8gb (2x4) DDR3 2133 Memory
WD blue 1tb HD
Asus dvd/cd drive

The two fans I had picked to replace stock APU fan and 120mm case fans;
Arctic freezer 7 pro
http://www.newegg.com/Product/Product.aspx?Item=N82E16835186134

Cougar VF-C12HB Vortex Hydrodynamic Bearing fan
http://www.newegg.com/Product/Product.aspx?Item=N82E16835553005

The case fans move what feels like little to no air, and the processor fan works, but keeping it cooler was suggested to me before.
Thanks

 

[Jhact]

If I were you, I would see how loud and effective the stock fans were before buying new ones.

 

[logainofhades]

Case fans should be ok, but I do recommend getting an aftermarket cooler. I would go with this one. It is a close cousin to the Hyper 212, but will allow you to install without removing the motherboard, as it will use the stock retention bracket on the motherboard.

http://www.newegg.com/Product/Product.aspx?Item=N82E16835103182