is up to personal preference, though a standard set up would be intake at the front, exhaust at the back and top.
LED's don't make any difference to the volume of a fan, however the better fans are made by companies who don't put LED's in them (if that makes sense).
You need to decide how much you want to spend on the fans, you can get them from £2 up to £20 really each depending on how good you want.
well my psu has 3 extra 4-pin connectors, i dunno if there such a way to get an adapter to change them to 3-pin?
Im willing to spend up to £10 per fan , i was looking for green LED fans, idealy not over the top loud.
Need 2 x 120mm 1x 140mm 2 x 80mm
If you could link me some fans it would be much appreciated
You can plug fans onto the motherboard so don't worry about psu connectors. Only those antec tricool fans (and maybe a couple of others) use 4 pin molex, the majority use 3pin headers to plug into your motherboard