We have used a couple of Volcano 11's and they are a good hs/fan combo.
NOT as good as SLK800's by a large bit.
I took my XP2500 and installed the Volcano 11 on it. I have a digital temp readout and the temps were about 8-10 degrees hotter than with the SLK800 w/Tt smart fan.
We have compared a lot of hs/fans and we have found NOTHING that will compare with the SLK800-SLK900 series of cpu coolers.
If you want the max cooling around.
Go for the new SLK900 and place a Tornado 100cfm fan on top.
You will be amazed with the temps.
We have built a couple of systems with the Xaser 111 cases, I don't know what the case open cable is either.