nah sparkle is ok they are good.
umm psu man, way overkill. get corsair 620hx or got silverstone 750w. Regardless of the amps that is just a big amount of money u could save.
cpu is ok but would aim for qx6850 a lil more but features newer steppings and is clocked higher and higher fsb.
680i is overpriced if u really want sli get 650i, imo get dsr3 or p5k p35 chipset.
only other thing i would say is if ur o/c get gskill HZ or crucial ballistix ram
with the heatsinks, currently the thermalright ultra extreme 120 is the best air cooler. also the tuniq tower 120 is great. as5 thermal paste is good and mx-1 pad is even better