well, with 7x120 fan @ 1900 you also had to have good ariflow and temps, especially with the 9800gtx wich has lower load ant idle temps than my 8800 ultra!
I suppose you have scythe slipstream, the SY122512SH ones, right? How does they work? Are they loud?
For the stacker i'm using a whole stock of nanoxia 120 fans (2x2000@1600 rpm on the true, 2x2000@1600 intake on the side panel over the vga, 2x1250 intake on the front and 1x1250 on the rear and 2x1250 on the top). They works pretty well, moving a lot of air and remaining quiet enough for my bedroom.
I've also a CM cosmos in the living room, with some scythe s-flex (1200 and 1600 rpm) on it, but i'm looking to upgrade with some more powerful ones and as now it is hard to find nanoxia fan, i'm wondering if these slipstream works well...