Sorry bout the lack of updates. The Raya break and all....
Have been making some modifications to the overall plan. Am switching mobos to this:

The DFI Lanparty SLi-DR Expert.
The reasons are this:
1. The positions of the PCI/PCIe slots will give me access to ALL the PCI slots with no loss of performance. I will be using my 7800GTX in SLi mode, and therefore, can leave the lower PCIe card withing the case. I only need to access the DVI connector of the upper card. This configuration will not allow me to run with multiple monitors, but since I'm using a 23" ACD display, I don't need to run multiple monitors anyway. Major advantage: Can now use my XFi AND a PCI wireless card and still leave a heathy distance from the SLi array.
2. Four sticks, 2GB RAM at 1T. (hopefully)
3. RAM will be cooled by the fan on the Aquagate radiator.
4. Four phase power to the CPU, Cooler mosfets.
Unfortunately, this means that my Mobo backplate will have to be retooled. It is presently positioned to align with the lower PCIe slot. I'll have to make another backplate to align with the upper PCIe slot. Need to drill some more holes.
Have also recut the acrylic for the PSU. It being my first attempt at cutting acrylic, the results were not ideal. Have now realized how to use the jigsaw to cut straight and curves on 5mm acrylic and have recut all the pieces again. Bottom, front, back and sides have been recut and this time all in 5mm acrylic (the sides were formally 2mm acrylic). No top, now that the second shelf will act as the top of the PSU.
Have also got hold of another 12cm CoolerMaster Aluminum fan to act as a intake fan for the SLi compartment. Have not decided how I'm going to mount it but given my affinity to 5mm acrylic - I think I'll make a vertical plate with slots to mount the shelves. Am still thinking about this one.
Pics to follow. At present, busy sanding the cut edges of the shelves to a smooth sheen.