Not sure what you are looking for here....It seems as though there is plenty of air moving through the case. Is it efficient?..., that's another question.
- 3 front fans...do they pull air across the hdd(s) or just for intake only? 3 front fans seems like too much up front but if you can deal with the sound then stick with it.
- Side fans....not a fan of em. I prefer to add a slot fan (like your Lian Li pci fan) to my case to help the gpu instead of messing with the air flow from front to back by adding a side fan that disrupts it.
- Top fans...a must, with the size of cpu coolers now its great to have help at the top where the heat resides. But 2 140mm's? I guess if you have the room and don't mind the noise go for it.
- CPU cooler...perfect push/pull config on a great cooler...no comment there!
What fans(details) do you have in it now? At this point I could only suggest better fans if they are of cheaper quality.
If your temps are actually better for it then keep obviously
Have you tested temps both with and without it?
decent time testing, hour of gaming each way I think should do it
don't just unplug the fan though, cover the gap with card or similar to seal it
I'd be interested to see the effects in 'realworld' application