I used to have the older variant of the Q-series full-tower case, and I've seen the newer one like you have. On the rear, yours has one 80mm fan hole below the power supply and a second hole above, right? The older type had both 80mm exhausts up above the PSU.
On the plus side, the Q-series is very sturdy and is great for adding blowholes, but it seems like an aging design. The hard drives don't get any direct airflow from the fans, and the "deck" that the power supply sits on restricts airflow to the upper area. Another pet peeve of mine is that the floppy bay is at the very top, requiring a long cable sometimes, and there is only one 3.5" bay, so if you also have a Zip drive you will need a 5.25" bay adapter. Long cables may be required for IDE drives in the top bays too.
If you're interested in a simple modification that improves the air intake of the Inwin bezel, I put a photo on
my tripod page showing how you can cut the bottom edge of the bezel out while maintaining a stock appearance. Porting out the fan holder, or eliminating it and cutting out the case metal where the intake fan is, really boosts the airflow in front and may reduce turbulence noise too.
D'oh, I forgot to actually answer the question, sorry... I would get some of
these YSTech adjustable fans. Dial up whatever noise/output level you like, change it anytime you like... sounds like the best of all worlds, and YSTech fans are excellent quality. You could even drill some discreete holes in the rear of your case and mount the knobs back there.