Help Me Choose the Last Parts for my HTPC!

[Pinecallado]

Hi everyone. This is my first post on this forum and my first ever computer build. I'm building a mini-itx htpc to play mostly 1080p movies/10-bit subbed anime mkvs since my laptop and ps3 fail to do either if those right. All the parts is going to be christmas presents for me so I'm trying to see if its possible to get all the parts from Microcenter so I can open my gifts by Christmas.

Anyway, these are the parts I have right now:
*Pentium G645 2.9GHz LGA 1155 Boxed Processor
*4gb Microcenter ddr3 ram
*120mm (I think) fan

I still have to get the case, hard drive, and power supply.

For the HD, I'm not sure if I should get

http://www.amazon.com/Western-Digita...7200+RPM+16+MB

or

http://www.microcenter.com/product/...ache_SATA_60Gb-s_35_Internal_Hard_Drive_-_OEM


One has less space but more postive reviews and the other has more space but more negative reviews complaining about a high fail rate.

Now for the case:

I'm stuck between http://www.amazon.com/MI-008-Tower-B...ords=htpc+case

and

http://www.microcenter.com/product/399001/Elite_120_Advanced_Mini_ITX_Case_(RC-120A-KKN1)

The first case has the PSU with it and is smaller than the cooler master one but I will have to wait a few days after Christmas to get it because I can only order it from Amazon.

The cooler master one will be more expensive because I will have to buy a power supply with it and it's bigger but I will be able to get it before Christmas.

If the cooler master one is recommend to me the most can you help me decide on the best, cheapest power supply I can get from Microcenter.

Here's a link that lists the power supplies from Microcenter from least expensive to most. But I guess I shouldn't play with the refurbished ones.

Thanks In advance everyone!