Help Memory

Hi,

I am planning to purchase the following configuration, to run FSX:

1. ASUS P6T Deluxe V2 Motherboard.
2. EVGA GTX 285 FTW OR EVGA GTX 285 Super Super Clocked.
3. CORSAIR 1000W HX Series 12v ATX SLI Ready 80 Plus Certified Power Supply.
4. 2xWD Caviar HD 1TB 7200 RPM.
5. Intel Core i7 920 2.66 GHz 8M L3 Cache.

My question is which Memory would be the best to work with my current confirguration :
1. OCZ Reaper HPC Edition Triple Channel - Memory - 6GB DIMM 240-pin DDR - 2000Mhz / PC3-16000 - CL9 - 1.65 V - unbuffered - non ECC.

2. OCZ Platinum Triple Channel - Memory - 6 GB ( 3 x 2 GB ) - DIMM 240-pin - DDR3 - 2000 MHz / PC3-16000 - CL9 - 1.65 V

3. OCZ Blade Series OCZ3B2000LV6GK 6 GB DDR3 PC3-16000 2000 MHz Triple Channel Kit (Much More Expensve)

4. Corsair TR3X6G1600C8D Dominator 6 GB 3 x 2 GB PC3-12800 1600MHz 240-Pin DDR3 Core i7 Memory Kit

5. Corsair TR3X6G1866C9DF Dominator 6 GB 3 x 2 GB PC3-14400 1800MHz 240-Pin DDR3 Core i7 Memory Kit

Or any other type / brand to give me the best performance!

Thanks,

utee