Yes that's the one. Tom's Hardware did a review pitting the NH-D14 against a bunch of water-cooling units to see how they faired (including the X40, so it's probably of interest to you):
http://www.tomshardware.com/reviews/h100i-elc240-seidon-240m-lq320,3380.html
Also if you're going to follow rojodogg's build, I'd recommend a K series CPU. The one he has is
not overclockable so it's pointless to spend your money on stuff like expensive coolers and Z77 chipset motherboards (which allow for overclocking). If you don't want to overclock, then don't bother buying a CPU cooler. Unfortunately if you want to have the option for more than one GPU, Z77 is basically the only current chipset you can go for. If you decide you only want a single graphics card though (which is honestly all you need for 1080p) then get a H77 motherboard as well which will save you some money.
Since no one really explained the i5 vs i7 issue which you brought up, I'll mention it now: gaming performance between an i5 and an i7 is
no different. The only difference between an i5 and an i7 (apart from the name) is Hyperthreading. Hyperthreading basically increases the the number of logical cores on an i7 from the 4 that there are on an i5, to 8. Since very few games use more than 2 cores and almost none use more than 4 (barring maybe Crysis 3) this really has no effect on gaming performance. Otherwise they are practically identical. The 8 logical cores (they aren't actually physically on the chip, physically the chip has 4 cores like the i5) are useful for things like video-encoding, so if you're interested in high-fidelity streaming it might be something to consider, but 95% of people on these forums will tell you for purely gaming, don't waste your money on an i7 over an i5. The i5-3570K is the one to go for if you're interested in overclocking (the i5-3470K mentioned before doesn't actually exist, and was a typo I imagine).
Another thing that hasn't been mentioned is choice of power supply. If you end up going with a single card (again this would be my recommendation for 1080p) don't waste your money on an 850W power supply, when 550W is plenty. Power supplies are also one of the most important components of a PC (which a lot of new people seem to miss) as if they malfunction, they can turn your computer into (in the worst) not much more than a burnt out husk (explosions are actually frighteningly frequent when reviewers decide to test lower class units for laughs). Here is a tiered list of power supply manufacturers/models:
http://www.eggxpert.com/forums/thread/323050.aspx The Raidmax recommended above is a Tier 5 unit for example, so personally I wouldn't really put my faith in it (even if it is just a rebranded better unit -- which I imagine it must be for the 80+ Gold rating). Personally I tend to recommend SeaSonic and Corsair, though XFX, Antec and PC Power and Cooling are all very solid Tier 1 picks, though Tier 2 is also very high quality.
M