crwdns2893792:0crwdne2893792:0 David Hodson ,
You can certainly replace the fans. A company called Talismoon sells fans that they claim to move much more air and are much quieter than the factory ones. I believe the model is the Talismoon Whisper fan. They all have LED lights in them (available in all kinds of colors), but I believe you can turn those off if you so wish. The fans should be available at most game console parts stores online that sell Xbox 360 mods.