Finished Look
That's how the inside looks with everything installed. As you can see there is still plenty of space left.
The case turned out as expected, it really looks awesome. Very clean and stylish.
Problems
I also had a few problems which I would like to sum up here.
As mentioned before the PSU opening is not deep enough. At least this was an issue with my PSU. It's not that much of a deal since it can be fixed with a little bit of force.
Another issue I had was when installing the top lid of the case. The case which is attached to the lid wouldn't fit the current setup, because the CPU cooler is too high and also it's in a different position. When moving the cooler to a different spot as stated in the manual you still have the bigger holes from the original mounting. Depending on the viewing angle this can be very visible. Even when I moved the fan it still wouldn't fit with the CPU cooler, so I just removed that fan.
After installation I noticed that the case had my fingerprints all over. Just wiping them away was not possible, not even with a wet cloth. You need to use something that is a solvent for fat, like soap. If you can, put on some gloves before starting the installation, it will save you a lot of cleaning trouble later.
A very serious issue in my opinion is that the HDD mounting transmits vibration all over the case. Basically the harddisk sound gets amplified a lot because the whole case acts like a big speaker. My way of fixing this was to cut out a huge chunk of foam, replacing the right HDD cage. Now the harddisk rests on this and can not transmit any vibration to the case.
When the case is not used with an optical drive you can not mount the included front drive bezel. I fixed this by attaching it with some sticky tape from behind. Zalman should include an extra bezel for this in a future revision of the case.
When used with an optical drive, depending on the drive model the installation may not be as straightforward because of too much distance between Eject button on case and microswitch on drive.