So in the near future (around december) i am gonna be upgrading my computer i plan on going SLI, although i dont know if i want to get another 770 or get 2 708s. I need a bigger case. right now i have a medium tower,. Is it worth getting an i7? or keep my current i5-4670k? Also i am thinking of overclocking in which case i will need a good aftermarket cpu cooler, or should i get water cooling/closed circuit water cooling?