Case fan question

[DeNo]

Hey guys, 

I have a question regarding the fans that come with the Phateks Evolv ATX Glass case. I just received it and am waiting to transfer my parts from my define R5. So I read some people say that they had ventilation issues with this case. I am considering ordering some be quiet silent wings 3 fans. Specifically, 3 120mm pwm fans for the front, 2 140mm pwm for the top, and one for the rear exhaust. I am also cooling with the be quiet dark rock 3 for my CPU cooler for my 6700k. 

So I have 2 questions ... How is the air flow with the pre-installed fans ? And the 2nd is ... how loud are the current fans ? Also any suggestions would be helpful. Thanks 

[othertomperson]

You have all of the parts. Why don't you try it, benchmark and find out? It's not like replacing the fans is especially laborious compared to some other components.

[DeNo]

Well that's the thing, I don't have all the parts yet. I am waiting for the CPU cooler to come. I figured since it was Black Friday and they are on sale, I'd pick up a couple fans. Though if the airflow is good enough and quiet enough, I'd prefer not to spend $120 on fans. Plus I like to hear what others say before I take the plunge.