Hi newcomer and welcome to the Tom's hardware forum.
U have an i7-920 that support tri channel, so, the 4GB (2x2GB) dual channel isn't a good option for take advantage of the tri channel feature u should go with this G.Skill PI series 1600 that have a much better CL and with less price.
Now if u insist in go with dual channel this G.Skill Ripjaws series 1600 are the best option price/performance and with less price and better CL u can get better performance over the Corsair.
P.D. Don't waste money in RAM coolers because that coolers usually don't give u any performance advantage.
I was looking at the G.SKILL PI Series 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800). They are $180 on newegg. I also noticed on newegg that the Mushkin Enhanced Redline 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) are $185 after rebate. The GSkill has a 7 latency while the mushkin have a 6 latency.
I never had mushkin memory before, is it worth the buy? Will they be good in the long run?