Mirroring comes after a good black paint (or even blue, green, anything dark) and a few layers of clear coat. When done right, you polish the hazed clear coat with auto compound and the mirror comes out. Heres a link to the writeup i used last time, and will use this time.
http://case-mods.linear1.org/case-mod-101-how-to-paint-your-computer-case-part-1/Well theres a ton of info online, but of the system i have built the quiest was my personal setup. When it comes to the water blocks i absolutely, hands down, love DangerDen blocks. I had a Maze WB on the cpu, northbridge, and vid card cpu's. Hard drive is overkill usually. Then for a waterpump i used....ill have to look at my reciepts in a bit cant member the model. But not submersable. I used a DD cylinder style resevior, not big you dont need much. I got the type with the divider wall, the turbulence helps. Then for the cooling i used the heater core from a 80's chevy pickup, 12.00 new at advance auto. The fan was a evercool aluminum 120MM affixed the the core with a custom acrylic fan shroud.
All 1/2in tubing. Distilled water with about a half a cup of Dexcool antifreeze. The AF not only helps protect against corrosion, but it shows leaks if they occur. You should bench test the setup for at least 25 hours before it goes in. Never use metal hoseclamps. I like to use a seperate enclousre for the cooling and use quick connectors to put it into the computer at one of the rear expansion slots. But with the new case being so big, i will most likely do it all contained.