As I am typing now, my system is running happily in my Q500 case.
The quote from the
http://www.In-Win.com web page said, "Snap on cage for extra fan, no screw required. Can generate better air flow for system (optional extra fan is not included)." :Q When it come to extra fans in a case, the seller should include if they provide extra fans with the case. If they don't provide one, order an extra. The snap on cage come with the case standard and uses a 80mm fan.

80mm fans are the most common in cases, but 60mm and 92mm fans are also used. 120mm fans are mostly for rackmount cases.

As far as Dremeling like TomY said for air flow goes, I cut out the front part of the metal grill were the fan is and snapped the cage back in place (I used a hack saw blade because I had no Dremel, but that was dangerous seeing as how the blade broke :| ). Cutting that out and covering the slates on the side made it quitter and improved airflow (That fan did not get all the air it wanted trough that metal grill).

That metal grill is made up of small holes next to each other if you were wondering. There is a possibility of mounting 2 more 80mm fans above the power supply without modifying the case. There are a great number of possible places to put a fan if you wanted to modify the case.
TomY,
You said, " Its strong point would have to be the rock solid construction...and I mean ROCK SOLID. You could sit a 300 pound guy on this thing without its sides on and it budge." You were not kidding one bit; this think is built ROCK SOLID.
My case came with the 300Watt Power Man power supply. (All Good).
Here is a direct like to the case specs.
http://www.in-win.com/framecode/ino_q500.html
You can email me anytime for help.

I also have a hotmail account if homestead does not work.
scifione@homestead.com
scifione@hotmail.com
Scifione's signature of the moment:
Coffee good. Help good.