at this price range you cannot go wrong with any mobo. i would go with the gigabyte UD4 since their U-line has always been the "serious" one, but i doubt you could buy something bad. just stay away from the "gaming" branding. the Force series is for extreme overclocking, so that's an option as well.
speaking of ram, you will see diminishing returns once you run it at 2ghz, so it hardly matters which one you get, i have always used the XMS series and it's always performed above average for little money. we are talking much less difference here than in buying a better vs worse cpu.
also note:
ram modules of different speeds are just modules where the timings have been loosened. if you do the maths, yes, you will see that faster modules are *slightly* better than slower ones but nothing that warrants crazy money. and you are practically guaranteed that any corsair stick can me made to run *faster* than the factory settings. often they run almost as fast as the most expensive, cherry picked ram. it's just that you aren't guaranteed that they can do that, and it's the guarantee you are paying for.
(i wouldnt buy ballistix - and thats funny, because i had a set of ballistix in my last pc - because that brand swings from top-class to shit-for-gamers without warning, and thats not very serious behaviour from crucial)
the H100i has both digital control (you can set a multitude of profiles of fan speed vs heat in your OS) and it's corsair. corsair have proven over years that they don't fuck with their customers, i am truly brand loyal to them because if something with corsair written on it breaks, they will take it back and gve you a new one.
there's even stories of people having their AIO bleed water and ruin a PC, and corsair replacing all the components.
also if you look at the benchmarks, all these same-sized AIO pretty much perform identical. maybe a 2c spread.
2x 970 is a brash decision. i doubt you will find anything which makes a single 97 sweat. afaik people on youtube are running 4k FarCry 4 @60fps on a single 970, all maxed except AA.
oh, and about EVGA. this is another brand which has them killing themselves to be NUMBERONE!!1!; their recent products have been stellar, as you can see in the reviews on
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Review_Cat&recatnum=13
they are also priced very nicely and you can even often find deals on them. and they look cool, and are modular. and i think 10 years warranty? or 5? something like that.