Alienware Aurora R3 Upgrade Compatibly query.

Hi,

I bought an Alienware Aurora-R3 about a year ago, it appealed to me mainly because of the fact it's so 'upgradable' and now that my warranty has expired it's time to do it. The only concern I have is that some of my upgrades may not be compatible. I'm not the most experienced PC builder and I don't want to kill my lovely machine, but I do want to increase the power. I did some research on all of the components before I wrote this so i'm fairly sure they will all be fine. If someone with a bit more experience and know-how could take a few minutes to have a look and just tell me if these things will work or not it'd be greatly appreciated. :)

My original PC specifications are as follows:

Aurora-R3 (A05) Motherboard
525W Power Supply Unit
Intel Core i5-2500K @ 3.30GHz CPU
6GB (2x2GB + 2x1GB) 1333MHz Dual Channel Memory
Single 1GB NVIDIA GeForce GTX 460
1TB(2x500GB) Serial ATA Raid 0 "Stripe" HDD

And the following are the upgrades I have in mind:

PSU -  Corsair Pro1050W Modular power supply (http://www.yoyotech.co.uk/item-detail.php?products_id=4373751)
CPU -  Intel Sandybridge i7-2600K Unlocked Core i7 Quad-Core Processor @ 3.4GHz (already installed)
RAM -  Corsair Vengeance 16GB (4x4GB) 1600MHz Quad Channel Memory (http://www.overclockers.co.uk/showproduct.php?prodid=MY-309-CS&groupid=701&catid=8&subcat=813)
GPU - EVGA 2GB GeForce GTX 680 (http://www.scan.co.uk/products/2gb-evga-gtx-680-superclocked-28nm-pcie-30-6208mhz-gddr5-gpu-1058mhz-boost-1124mhz-cores-1536-brown-)
HDD -  Corsair 120GB SSD (http://www.amazon.co.uk/gp/product/B0057QETGS/ref=noref?ie=UTF8&s=computers&psc=1) [Windows only installed]
         - Western Digital Caviar Black 1 TB HDD (http://www.amazon.co.uk/dp/B0036Q7MV0/ref=asc_df_B0036Q7MV07576075?smid=A3P5ROKL5A1OLE&tag=googlecouk06-21&linkCode=asn&creative=22206&creativeASIN=B0036Q7MV0)
          - Keeping the 1TB(2x500GB) Serial ATA Raid 0 "Stripe" HDD so all 4 slots are used.

Thanks in advance,

Dann