This brief look into the world of professionally-built liquid-cooled systems includes only a small sample of the number of system integrators. There are a lot of variations and customizations inherent in water cooling your rig, but these guys have what it takes to build your system. If you don't have the time but you want the "coolness" of a liquid cooled system, let them do it for you!
Of all the companies, there are two that stand out from the rest: Puget Custom Computers and All American Computers.
Puget allows you to customize your computer with a lot of variations. If you look at their website, you will might be surprised at the number of options available.
Kyle and his crew at AAC are no slouches when it comes to options either. They can build you a system from anything available on the market. If you want red LEDs, green cold cathodes, brown coolant, and a blue motherboard... well, it will be an awfully wretched looking system, but if that is what you want, you can have it. Several generations of thought and effort went into creating their LiquidXS cases, which are the perfect way to showcase some of the best-performing PCs on the planet.
There are others that can build you a water cooled rig, like Rahul Sood's Voodoo PC and Kelt Reeve's Falcon Northwest. What is great about builders like those big guns, as well as the AAC and Puget crews, is that they will talk to you before a system build request is even sent to the assembly team. What I like about the small handful of gaming system integrators, is that they are passionate about their work. They will do as much hand-holding as it takes to make sure their customers get exactly what they want. If you have the money and are looking for a solid system built your way, you should give these guys a shout.