cable sleaving is sooo over done now days
i like the idea of some aluminium tube or like what they did in the hevy water project or waht ever it was over at atomicmpc < google that i cant remember the website
dust is your friend not only does it make your computer run hotter and there for keep your room nice and warm but but it also dampens the sound your system makes
ahhh dust is my friend then why not yours
if you run the cables from behind the mobo, you could solder the mobo power conectors onto the back of the mobo, or but plugs on the back so you dont have to have the cables o the mobo side.
i would use 2x small CC's in the shape of a V with the point at the back of the case, while it soulds funny it will give an even glow on both sides, front and rear. trust me i have tryde it and it works grate