Will overclock help me

Solution
yes, great choice! (the real question is do you like it?) That red theme does look very good in case!

For intense gaming, if you have the eye, then 144Hz is defiantly worth it.
depending on how you mount the cooler, that ram will fit; (not all motherboard ram slots are in the same spot, but this is for a standard ATX board.)
http://media.bestofmicro.com/Z/V/325291/original/cooler-master_hyper-212-evo_install-2.jpg
(If you slot the ram in the far right, and in the 2nd from the left slot, it should fit nicely if the cooler is mounted vertically)

If you want to overclock, get this board instead; (I would suggest go for an oc build)
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157500&cm_re=z97_extreme6-_-13-157-500-_-Product

$30 more, but the 12+2 phase power design (Z97-A has 8+2) and ability to keep CPU stable at higher speeds, is worth it. Also matched your blue ram modules :)