[Akuma]

Putting excess wires behind the mobo tray (like you did) is the most effective way. Try running the wires from the power supply directly behind your cd/dvd drives. Then run them down behind the hard drive cages to where they are needed. So only what it needed shows. If you are chaining devices together try tucking the extra wire behind the cages or between devices. As for the huge atx cable... There isn't much you can do with that. Plug it in then try to coil it up tape the rest up at the top of the case near the psu. Use your imagination. If you have any empty 5.25 or 3.5" bays try tucking extra wire in there.