Whatever floats your boat. I cant see myself spending big money to make it a big pretty box, but if that is what you like, go for it.
If you want to see some of the best stuff as far as case mods go, visit this site -->
http://www.pimprig.com
The clear cases look very cool. My buddy saw one when he was at plycon - he said it was bad to the bone. Personally, I would buy the baddest video card on the planet before I spent that on a case and lights, but you gotta respect the work.
The water cooling and the pc air conditioning are both cool for the quietness alone. Let me know how it turns out.