The stock fan is LOUD. I'm tired of heing able to hear my PC (in my room) from my living room with the TV on. I get temps of 39-43C and it cools great snd i don;t want to buy another Heatsink as i just need a fan..how difficult is it to replace the fan and i want a fan that can handle cooling an XP1700+ and is dang near silent. Thanks any recomendations on a QUIET FAN.