I went for the Grandia GD01, as it has a different HDD cage layout.
One long cage with the drives on their sides. I have 5 HDD and a 8800 in mine, and I reckon I can fit another hdd to the other side of the gfx if I tried. The GPU essentially takes the space of 1 HDD.
The Accelero does NOT fit in any of the Silverstone, its a few mm proud. I did however fit mine briefly (was on my 7800) by taking the plastic off and bending the ends of the heatpipes with some pliers so they lay flat, then it fit and was fine.