If you are looking for a high quality computer case, the Antec 900 is the way to go. I have worked with many computer cases over the years, but the Antec 900 is one that outstands among most. The case has the ability to move a massive amount of air, keeping temperatures nice and cool. I especially like the fact that even though the fans are doing their job, the noise factor is not much of an issue. The sound is kept to a minumum.
There is plenty of room available in the case for customizing your PC. The only issue that I have with this particular case is the placement of the power supply. You'll need a few extensions here and there, but I don't consider this a major problem.
Overall, the Antec 900 case is of excellent quality. The durability and proper airflow are key advantages with this case design.