New Build

I placed an order on Newegg for all the pieces for this build already and noticed one issue with the RAM that could have saved me some money but since the components have already been ordered I am just wondering if I should be on the lookout for any other compatibility issues when putting it together. Please feel free to input any additional comments in regards to this build/hardware.

Case: COOLER MASTER HAF 932 Black RC-932-KWN3 Black Steel ATX Full Tower Computer Case with Side window

http://www.newegg.com/Product/Product.aspx?Item=N82E16811119230

Power Supply: CORSAIR CMPSU-850TX 850W ATX12V 2.2 / EPS12V 2.91 SLI Ready CrossFire Ready Active PFC Power Supply

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139009&Tpk=Corsair 850

MOBO: MSI 890FXA-GD70 AM3 AMD 890FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard

http://www.newegg.com/Product/Product.aspx?Item=N82E16813130274

CPU: AMD Phenom II X6 1090T Black Edition Thuban 3.2GHz 6 x 512KB L2 Cache 6MB L3 Cache Socket AM3 125W Six-Core Desktop Processor

http://www.newegg.com/Product/Product.aspx?Item=N82E16819103849

CPU COOLER: CORSAIR Hydro H70 CWCH70 120mm High Performance CPU Cooler

http://www.newegg.com/Product/Product.aspx?Item=N82E16835181013

MEMORY: CORSAIR DOMINATOR-GT 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 2000 (PC3 16000) Desktop Memory with Airflow Fan Model

http://www.newegg.com/Product/Product.aspx?Item=N82E16820145330

GPU: MSI R5870 Lightning II Radeon HD 5870 1GB 256-bit GDDR5 PCI Express 2.1 x16

http://www.newegg.com/Product/Product.aspx?Item=N82E16814127509

BOOT SSD: OCZ Vertex 2 OCZSSD3-2VTX120G 3.5" 120GB SATA II MLC Internal Solid State Drive (SSD)

http://www.newegg.com/Product/Product.aspx?Item=N82E16820227590

STORAGE DRIVE: Seagate Barracuda 7200.12 ST3500418AS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5"

http://www.newegg.com/Product/Product.aspx?Item=N82E16822148395

MEDIA: LG WH10LS30K 10X Blu-ray Burner - LightScribe Support

http://www.newegg.com/Product/Product.aspx?Item=N82E16827136181

I already noticed it was probably a stupid idea to get 2000mhz DDR 3 because my CPU would not support it but I was having difficulty finding matched 4GB sticks for AMD systems. I already purchased it and it should work for my system at a slower speed if I am not mistaken? I also plan on using AS5 for the thermal compound and adding an extra 140mm fan to the top of the case for exhaust. Again I would appreciate any input or advice on making sure this system goes off without a hitch.

You could of saved a lot of money in this build, although I would of got this HD:

http://www.newegg.com/Product/Product.aspx?Item=N82E16822152185