I have two LC (Levicom i guess) 300w , each with a low dB 80 fan on the rear, and plenty of openings.
Probably could use some extra airflow (fans) thou...
http://clientes.netvisao.pt/carlo001/psu1.jpg
http://clientes.netvisao.pt/carlo001/psu3.jpg
However , i covered the front with this:
http://img74.echo.cx/my.php?image=dsci00673cw.jpg
PS: sorry about the image quality-> crappy digicam.