I too am in the process of having a dual-rad, parallel system built so I'll add fodder for additional "that won't work" feedback.
Two Scoops and XLR 120s Rads from
http://thescoopstore.tripod.com/olshoppingpage.htm
Pump is still being researched but leaning towards Eheim 1250. I am very particular about this component because, although it has to flow enough for the setup, I'm looking for the quietest one that does the job.
LRR or Spir@l WB (Waiting on additional reviews of the LRR).
Bay-Res reservoir
One Scoop/Rad will be mounted horizontally inside top rear and the other vertically lower front of a $59 black MAXTOP CSF-910 file server case.
Case and rad fans will be controlled by a digital 8 fan controller with LCD display & dual thermal probes from epowerhousepc for times when I doubt I'll need the fans running. Of course, it will also have the obligatory window(s).
These components are the basis for my first custom-built WC venture. Approximate cost is $450 without shipping.