Or buy any of these kits for identical ICs but are lower cost.
Identical timings and voltages, yes. Identical ICs under the hood...I wouldn't be too sure about that.
Lots of 9-9-9-24 @1.5v stuff from Elpida, Powerchip and Nanya so without looking at serial numbers (for GSkill branded), or version numbers (for Corsair branded) it is really a crap shoot as to what is under the hood of those modules.
Here is another alternative that one of the other fellas posted about in the Online Deals section...$48 shipped...one of the better deals currently available.
Patriot Memory Viper 3 Series Venom Red DDR3 8GB 1866MHz (PC3 15000) Memory Kit PV38G186C9KRD
Online Deals thread:
http://www.overclock.net/t/1378214/amazon-patriot-venom-red-2x4gb-1866mhz-c9-48/0_40Edited by Reefa_Madness - 4/3/13 at 10:25am