That stuff is truly awesome.. 4GB just overclocking 400Mhz with no voltage increase or timing loosening. 4GB DDR3 that reaches 2000MHz that is by the way!!
I don't think that is too expensive as it is really. It's dear but it's also possibly one of the very best!
CPU: Intel Core i5 2500K @ 4700mhz - 47 x 100MHz
Mobo: MSI P67A GD65
GPU: EVGA GTX 570
RAM: 2 x 4GB Mushkin LV 1.35v 1600MHz DDR3
HDD: 3 x 1TB Samsung Spinpoint F3's
Case: CoolerMaster ATCS 840 - Custom House of Kolor paint job.
PSU: Corsair HX750
Cooling: Custom WC - XSPC Delta V3, PA120.3, DDC Ultra with XSPC Res Top, 3/8" XSPC UV Green Tubing over 1/2" Barbs
OS: Windows 7 Enterprise Edition 64-Bit