If you flip the rad around, it might work out better. Here's how I set mine up:
http://www.sfu.ca/~bkh2/Comp/P8300091.JPG http://www.sfu.ca/~bkh2/Comp/P8300094.JPG http://www.sfu.ca/~bkh2/Comp/P8300095.JPG
From the first pic, you can kind of see that the tube quite long and wraps around the fan. This allows a lot of excess tubing so the graphic card can be taken out easily. I actually recently changed my loop to this configuration because I had trouble taking out/adding graphic cards. The res is attached by one screw, through the motherboard. In fact, the threading on the screws that come with the reservoir match the threading in the motherboard, so no modification is required.
Also, the pump isn't attached in any way; it's free floating. This isolates the pump from everything so it's quite quiet. In addition, the pump can be bent towards you (out of page) which allows even more slack for the tube in front of the graphic card. This configuration only occupies the top 5.25 bay, leaving the 5 others completely free.
Edit: Just for reference, this was my old configuration:
http://www.sfu.ca/~bkh2/Comp/P2150136.JPG
Notice how close the tube going from the res to pump is to the graphic card. This issue is also minimized by having a free floating pump.