Watercooling help, plz respond

Whether custom-watercooling is worth it depends on what you want.

Price/performance - In no way is it worth it, it simply costs too much to consider going at it from a value angle.
Pure performance - Yep, custom water-cooling will get you better performance than air heatsinks or any CLC water-coolers if you make your loop right.
Aesthetics - Water-cooling can look amazing.
To advance yourself as an enthusiast or as a hobby - This is arguably why most people water-cool their rigs, because they just want too. Its a perfectly valid reason IMO, its not like I really need the water-cooling on my rig.

If your interested in custom water-cooling, the water-cooling sticky is the place to start. Will explain everything you need to know to get a basic idea of what your doing.
http://www.tomshardware.com/forum/277130-29-read-first-watercooling-sticky