Looks good to me :-). I love the Dangerden waterblocks. As far as radiators go, the black ones at
www.overclock-watercool.com are pretty awesome too. You may want to install an expansion tank on your system so that it is not difficult to bleed out the system. Do this by mounting a "T" fitting near the pump. On the part of the "T" that is not attached to the watercooling loop, run hose to a higher part of the case. Then have a reservoir up there. The reservoir does not need to be full. Actually, it doesn't even need to have water in it, but you can add water to the loop through the reservoir to bleed it out.
Although Joe's design for DH3 is slightly different, he uses the same principle of having a reservoir w/ an inline pump. It just makes things a bit easier... especially if this is your first time.