Planning to get case fans for my build however i dont know whats the best cfm to go for that has low noise operation and keeps your pc cool. The Cryorig QF120 Balance Series 120mm PWM Fan looks cool but it says 25db pusing 49cfm at 1600rpm max. Can anyone tell me a good cfm to aim for when shopping for 120mm and 140mm case fans and can anyone recommend a good quiet case fan thats not expensive and not full of bells and whistles (yes i dont care about rgb).