How is this build?

[LegoMyGeggo]

Hi Guys,

Just wanted some input on this HTPC I am building for my parents and that I hope to upgrade to a steam box at some point down the line.

PCPartPicker part list: http://pcpartpicker.com/p/2lEgw
Price breakdown by merchant: http://pcpartpicker.com/p/2lEgw/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2lEgw/benchmarks/

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($130.00)
CPU Cooler: Cooler Master GeminII M4 58.4 CFM Sleeve Bearing CPU Cooler ($32.98 @ OutletPC)
Motherboard: Asus GRYPHON Z87 Micro ATX LGA1150 Motherboard ($162.99 @ Amazon)
Memory: Crucial Ballistix Sport 8GB (1 x 8GB) DDR3-1600 Memory ($66.95 @ Amazon)
Storage: Seagate 600 Series 480GB 2.5" Solid State Disk ($287.27 @ TigerDirect)
Storage: Western Digital WD Green 2TB 3.5" 5400RPM Internal Hard Drive ($86.99 @ NCIX US)
Power Supply: SeaSonic X Series 400W 80+ Platinum Certified Fully-Modular ATX Power Supply ($129.99 @ Amazon)
Optical Drive: Pioneer BDR-208DBK Blu-Ray/DVD/CD Writer ($64.99 @ Microcenter)
Other: Gryphon Armor Kit ($45.00)
Other: Silverstone GD05 ($100.99)
Total: $1108.15
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-12-17 10:02 EST-0500)

I picked the i5-4670K there since my friend had an new extra one that he is selling me at that price. I chose the Silverstone case because it can fit a full sized GPU, which I will eventually install some time down the line. I have an SSD (got sucked into an amazon cyber monday deal XD) that I will be using to install the OS onto and will be using the storage to store movies and stream to other devices.

I was thinking of going with the Gryphon z87 because of Asus' wifi-go! capability that would allow my parents to control everything with their smartphones/tablets. They already control the receiver/TV with their phones/tablets. If you have any other suggestions, I would be open to them .

Questions:
-Do I need the gryphon armor kit or would the cooler master geminii M4 be good enough?
-What OS would you recommend? Between Windows 8.1 vs 7? And would I need the pro version of the OS or is the regular one ok?
-Is the WD Green a good HD or is there anything else you would recommend?
-For the BD player, does it matter if it is OEM or not?

Approximate Purchase Date: I am planning to buy the parts today or tomorrow.
Budget: ~1200
Additional comments: Mainly for movies/streaming and upgrading to steambox down the line. Would want it quiet.

Thanks in advance for your help!

 

[cooldex]

os i personally still recommend windows 7 but newer games will be optimized better on windows 8.1

Wd green drives are very good for storage cause they are low power and cheap i owned a 1TB WD green

and OEM or not doesnt matter a bit

 

[LegoMyGeggo]

Thanks cooldex. Any thoughts on the cooler master thing vs the gryphon armor? Also is there anything on there you would change to make better or are the parts I chose ok? Thanks!!