For a full custom liquid cooling setup, I would go with something like the Corsiar 900D case. It's huge, but has tons of room pre-designed for custom liquid cooling.
If you're not as adventuresome (like me), the Kraken X60 is practically unbeatable as an AIO water cooler. It outperforms my old Corsair H100 by 12C - 18C
For hobby, the ASUS 32" 4k monitor would be killer.... but so is its price... but those NEC's aren't cheap either. I had the option of getting the NEC or the Dell Ultrasharp U3014... I chose wrong & got the Dell. It has two big problems, random color temperature shift, and backlight dims & brightens on it's own. Wish I had gotten the NEC when I had the $$$
I hear the HP 30" is pretty decent, though I heard the same about the U3014....
There are some really nice high-res monitors though, & if I could still send it back to Newegg, I would exchange the Dell for the smaller NEC PA271W-BK 27" 2560x1440
For $999, it's a really good price for a professional level display.
Asus also makes a pair of really nice 27" 2560x1440 displays:$599 PB278Q PLS screen$879 PA279Q AH-IPS screen
The second one is probably the best option to the NEC, it's ASUS's "Professional Artist" line & their flagship 27", the PLS screen is however one of the most popular 2560x1440 displays right now because it's pretty darned good.
If you're serious about triple monitors, go with 2560x1440 displays, & plan on gaming on all 3 at once, then you're going to need Dual Titan's in SLI to satisfy the 11 million+ pixels to be rendered per frame. Gaming on one & anything in the GeForce GTX660-Ti class or higher will work fine & support up to 4 monitors on a single card, that's what I'm using on my 2560x1200 Dell.