This is highly relevant to my interests
Be warned though
Unless your placing the PC in another room or are using headphones/earplugs or anything similar(or are deaf) 24/7 the noise will eventualy get to you:P, but still its not exactly "practical " with 5-6 fan controllers either. My main rig has 17 GT AP-15's running at full speed at all times and she is quite noisy whenever I turn off the speakers. Was fine for the first ~6months or so.
I find myself using either my secondary rig or my linuxbox whenever I dont play games nowadays. Another problem you might have is dust, the more fans the more dust. Well, if your not using dustfilters that is... and even if you are there will still be some. Delta temperature is the difference between ambient and the CPU right? Even if you plan to fully utalize the potential of the case I dont think that youll manage 1 degree C delta temperature at all times. At idle maybe, but not under load.
Anyways, I'll be following this thread and I'm looking forward to pictures