I am also curious to know what some of the PSU companies are talking about with 'compatible with Intel Sandy Bridge Core i3 i5 i7.' Do I need a specific PSU to take full advantage of my i5?
That doesn't mean anything. As long as your PSU has a +-8 pin voltage connector and a +-24 pin power connector you'll be able to run any motherboard.
It is only semi modular but is $39.99 after promos and you don't have to even think about compatibility (not that you would have a problem with your choice, but still ) http://www.newegg.com/Product/Prod [...] 6835103065
That link goes to the Hyper 212.
Your build is a good start but could use a bit of tweaking, these would be my suggestions:
I'd suggest reading this - they didn't like the Antec Kuhler when compared to the H70, and I'd just stay away from liquid cooling altogether. If a fan breaks, you just go and buy a new fan. If a water pipe breaks, there goes your system. And the manufacturers won't honor replacements either: http://www.tomshardware.com/reviews/h2o-h80-h100-benchm...
Whatever your minimum wattage is, add 50W if you plan to overclock and another 100W if you plan to SLI or Crossfire your video setup. On a build where the minimum is 500W, for example, get a 650W just to be on the safe side.