Kraftmacincheese, both Conundrum and Shadow703793 have been working this board for a long time, and yes, they may have become a bit jaded responding to posts from users who want to build a "kik butt watercooling setup."
Those of us who have taken the effort to learn did it first by READING everything we could find. We did not ask to be spoonfed, but instead read just about every forum post we could find. Google or Bing are your friends.
For your information, even with a six-core processor, you are not going to experience any greater amount of heat than we have already encountered in the past. Due to smaller manufacturing and energy-saving technologies, even a six-core processor today doesn't hold a candle to some of the energy-intense Netburst processors Intel released 4-6 years ago, when I started to build WC rigs.
The newer cores are all capably handled with air cooling, and water cooling really is something that is either done by absolute enthusiasts looking for the best overclock or modders who do not have room for air cooling in some of their builds. A subset of the overclockers have gone on to more exotic cooling extremes, such as phase change or LN2. But even these guys use water cooling for their everyday rigs.
The pump you are looking at is overkill. Conundrum is right, if you are cooling just one rig, it would dump way too much heat into your loop for the amount of water it would move. Add to that the additional cost of the relay, and you would end up spending as much on your pump as you would for half of the rest of your system.
Now, if you were looking at an institutional setup where you are cooling multiple machines with one very big, reliable pump, something like this would make sense. You would need high flow and a big head on a pump moving more than one cooling loop.
As for the OCZ Cryo Z, this is a phase change cooler. You will absolutely have to use silicone conformal coating on your mainboard to prevent condensation from damaging the board. You will also have to use neoprene around the CPU socket for the same reason, since the cooler will get below freezing and any moisture in the air will condense around any of the exposed metal. You have to do this any time you cool below sub-ambient.
Good luck on the phase-change cooling. You have an even more steep learning curve ahead. Have fun with conformal coating...I know, I've done it. Just wait till you get your first fry, and have to replace your mainboard and do it all over again. It happens, I've done that too.
If you do decide to watercool, read read read read READ. There is a lot of information out there, some of it old, some new, a lot of it very useful. I've been aroudn the block more than twice, and will be the first to tell you that watercooling, while still a fringe endeavor, will give you the best bang for your buck when it comes to cooling and maintenance of that cooling system.