Sorry for the very slow reply, DH. I haven't been keeping up with the site very well this week. Hope I'm not too late to help.
That setup sounds pretty good. If you're just buying your pieces now, you should think about the TDX instead of the RBX, but the differences are pretty minor. Bay reservoirs don't have a great reputation because they're a bit short for good bleeding and people seem to have more leaks with them for some reason. Finally, for the ultimate in quiet, a thinner radiator (e.g. Black Ice Pro 2) will let you undervolt your fans a bit more.
You are definitely going to need big case for all that stuff, particularly the Iwaki and the double core. Look at the FS020, the Chenbro Genie, full towers, and cube cases. Two sites with a bunch of good pictures are Coolcases
Keep us posted!