I am using an NZXT S340 case with two basic Thermaltake case fans (salvaged from previous Thermaltake case) as intakes in the front. The stock fans that came with the NZXT case are used as exhaust fans on the top and back sides. However none of these 4 fans are good and the temps get pretty high. The cpu goes over 60 degrees (i5 6600k with cooler master hyper 212x) and the gpu reaches nearly 80 degrees (sapphire nitro r9 390).
So i want suggestions for good case fans that will improve the airflow and temps.