Here ya go Phil. Spend a few days, you won't have to ask these questions.
Take your time to learn while you wait. I wrote this a while back, it will help get you on the right track.
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For your benefit please spend a few days reading a LOT. Here and at the busiest places for WC masters. Guys who have done it for YEARS at OC forums and xtreme forums. It took me a while (I was OCing on air, aftermarket stuff, bios settings, best chipsets etc etc) to learn the language and the tricks to a easy install.
Don't expect miracles, or SUPER DOOPER over clocks. What you will get is a quiet system that can handle OC to the max of your hardware IF you buy quality and buy smart. And minor maintenance too, a bonus for the water cooler.
Also while there please read on case mods etc. The radiators are not for small cases, the pumps and hose routing, wire management and other things are important to understand. Google your planned case and the word water-cooled in one line. You might get lucky.
IF you just cool your CPU and your NB if you want, you can get by with a 120.2 sized radiator (RAD). And MAYBE fit in inside depending on your mod skillz. You want to cool your GPU too, you'll need a 120.3 sized rad, and it won't fit inside. The rear external rad really works great. No matter what your adding 15lbs to your PC, maybe 20lbs.
Once you got an idea of what is good/bad then start getting your system for WC put together and we'll be glad to help.
http://www.xtremesystems.org/forums/index.php? Not a noob site, but great stickies
http://www.ocforums.com/ My fav, good peeps, know their stuff, less hardcore
http://www.skinneelabs.com/MartinsLiquidLab/
http://www.over-clock.com/ivb/index.php?showtopic=20277 A GREAT Europe site
http://www.overclock.net/water-cooling/
http://translate.google.com/translate?u=http%3A%2F%2Fwww.effizienzgurus.de%2Fmain%2Findex.php%3Fcontent%3Darticle%26action%3Dview_spec_article%26article_id%3D222&langpair=de%7Cen&hl=en&ie=UTF-8 Info on rad testing
This is a solid touch on what info is out there. Get a drink and read for a few hours each day.