Alright, after many an hour spent crouched over this damn case, I think I am finally done.
So far I'm quite happy with noise levels and temperatures.
Really a pretty standard build, the only thing I did was put a Phobya 200mm radiator in place of the hdd cage, which I believe no one really needs anyway.
Basically I built two aluminum frames, which serve as shrouds and adaptors to marry radiator with case and fan.
I know, this isn't entirely straight, I was growing a bit frustrated at times and took the "form follows function" approach here.
No need to tidy cables up if no one if they are out of sight, right?. Bottom right behind the psu is the fan controller.
I reversed the direction on the rear fan, in order to provide the triple rad with a bit of fresh air, so I installed a dust filter here as well.
The only modification I am currently considering is switching the big front intake fan for two GT's, as I have a feeling that it is struggling a bit to suck air past the front panel. Removing this and the dust filter decreased water temps by a full degree.