Hmmm, somehow I doubt that 2x 120mm and 1x 80mm fans facing inwards, with one relatively low speed psu exhaust, could be beneficial. However, when the time comes, I might give it a go. In fact, I wouldn't know how to arrange the heatsink fan(s) if I did that. Are you aware of how this case is designed - the mobo is upside down.
I'll probably just be stubborn about it and assume that having the wind tunnel effect is a good thing. I'll most definitely have one fan on the heatsink because I reckon I won't use the plastic wind tunnel supplied with the case. The rest of the case should get better cooling and so hopefully the psu wont run as loud.
What I really want to know about is having two fans on the PSU. No speculation please, and no comments about the rest of my system, just tell me what you know about push-pull configurations on heatsinks, OK?!
I HAVE seen positive results, but also a few neutral/negative ones. Is there a proper way to do it? Hence I ask about ensuring negative pressure, as opposed to having turbulence caused by the rear fan not being able to keep up with the front.
Your suggestions ARE being taken on board, cheers.