I recently bought a new case and water cooler for my two and a half year old build. After waiting for the R4 to go on sale I pulled the trigger and I absolutely love this new look. I used to run with a Cooler Master HAF 922, Corsair A70 and a bunch of high rpm fans. I wanted something that looked a little more sleek and was quiet. I have my 3 case fans on the fan controller and the h100i on a custom curve. I used some mounting brackets for my Hard Drive and removed the extra drive bays for a clean look.
Most of these prices are from the fall of 2011. I'm most likely going to upgrade the graphics card over the summer and maybe invest into a SSD. Also another 8GB of matching ram would be nice but right now it seems so expensive.
I ran prime95 for about 10 minutes to test the new cooler and it holds up very well for a reasonable overclock.