being able to see a few cables is where ti's at man. It's pretty **** cool to see like two cables and thats it in your window. No cables at all and it looks...boring. This is why you get some cathodes and some UV reactant cables and bam. Or just get colored cables to accent your case and be done with it. Just be sure to get lots of zip ies and remember electrical tape is your friend.
EDIT: Buy a frickin PSU that has cables already sleeved, as well as some colored SATA/IDE cables.
You don't have to even sleeve all of your cables in a case like that. Just add these adaptors on the ends of them and through the case you will only see these colors if your PSU is not sleeved. Making a case look good is just common sense.