Thanks for your reply.
So, the 92mm fan will be in the back as exhaust, the 120mm (1350 rpm)will work as intake at the front.
Is it worth putting another 120mm as exhaust at the top? Will that make a difference?
Both fans will be connected to the psu, which will be at the bottom of the case.
That makes sense. I would connect the fan at the top to the motherboard so it can be controlled depending on CPU temperature. Then the front intake and the back exhaust will be connected to the PSU and run at 100% at all times.
And yeah, try to get quiet fans, especially the ones you connect to the PSU. You don't want really noisy fans running at full tilt constantly.