Front Fans Define R4?

[Crims]

Are the stock fans any good to use in the front of the Define R4? Do they have high enough static pressure to move air through the front of the case, seeing as it has to pull air through the front side grates (immediate front intake is covered by a door) and push it across the drive bays? Any suggestions for fans that might be better?

Also, would using one of the stock H100i fans (replaced with Corsair SP120's for aesthetics) on the bottom of the case do decently as an intake? Don't have any other 120mm fans that would fit. Case can mount a 140mm, but my PSU is too big and only allows a 120mm.

Any other suggestions on how to properly ventilate my case would be greatly appreciated.

Edit: Don't want to spend much more than $60 on new fans.

RIG SPECS:
CPU - Intel i7 4790K @ 4.0GHz
CPU COOLER - Corsair H100i w/ Blue SP120's
MOBO - ASRock z97 Extreme4
GPU - Gigabyte G1 GeForce GTX 970
PSU - EVGA Modular G2 750W
HDD - WD Black 1TB
SSD - Crucial MX100 128GB
CASE - Fractal Design Define R4

 

[TheMagicalWallaby]

The stock fans are fine.

 

[Crims]

The stock fans are fine.

Sounds good. Wasn't sure just because the airflow is so blocked due to the way that the case is made. Will throw those on the front and add another fan for exhaust in the back.

 

[TheMagicalWallaby]

The stock fans are fine.

Sounds good. Wasn't sure just because the airflow is so blocked due to the way that the case is made. Will throw those on the front and add another fan for exhaust in the back.

A simple way to test it, is to just put your hand in front of the fan (or a piece of paper) and feel/see if the fans work well.