If you're thinking about a clear acrylic case, you better be also thinking about some serious wire management and over-all one uber clean installation.
The only way those cases look good is if you spend a lot of time making them really, really neat.
This is a SUPER bad example of what you want your clear case to look like. This makes me want to smash that thing in 1000 pieces.
If you're going to have a clear case, you've got to be anal and wire sleeve absolutely everything. NEAT, NEAT, NEAT... That's the only way it looks good.