Multi-media, console replacement

 Hello all, this is my first post here I am looking into building my first PC. I am wanting to replace my Dell Inspiron 530 that has an Athlon II x4 630, a NVIDIA GT 610, and 6GB of RAM, I currently use my PC mainly for streaming media and watching movies, I play a heavily modded Fallout 3, and a vanilla Fallout NV that I plan on modding in the future. I also play Team Fortress 2 and Civilizations V.   I just got into using emulators as well. 

 I plan on building a small form factor PC that I can use as my main rig for now, In the near future I would like to play Bioshock Infinite, Titanfall, and the new Civilizations. In a year I want to  dedicate it to the family room as a N64/Gamecube/Wii console that can be used to play some PC games and my Bluray collection, also to connect to my home network and play movies that I have stored on my network, 

I will order everything from Newegg, and Hopefully will be building within the next two months.

PCPartPicker part list:
Price breakdown by merchant:

CPU: AMD Athlon X4 760K 3.8GHz Quad-Core Processor ($84.73 @ OutletPC)
CPU Cooler: Corsair H100i 77.0 CFM Liquid CPU Cooler ($89.99 @ Best Buy)
Motherboard: MSI A88XI AC Mini ITX FM2+ Motherboard ($99.99 @ Amazon)
Memory: G.Skill Ripjaws Z Series 8GB (2 x 4GB) DDR3-2400 Memory ($79.99 @ Newegg)
Storage: Corsair Force LS Series 120GB 2.5" Solid State Disk ($89.99 @ Amazon)
Video Card: MSI Radeon R9 270 2GB TWIN FROZR Video Card ($179.99 @ Newegg)
Case: Corsair 250D Mini ITX Tower Case ($84.99 @ NCIX US)
Power Supply: Silverstone Strider Plus 500W 80+ Bronze Certified Fully-Modular ATX Power Supply ($79.99 @ Amazon)
Optical Drive: Asus BW-16D1HT Blu-Ray/DVD/CD Writer ($69.99 @ Newegg)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($89.98 @ OutletPC)
Total: $949.63
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-04-22 18:15 EDT-0400)

 I chose the FM2 CPU over a FX part because I have a clear upgrade path with AMD releasing Carrizo next year.

I have a 1TB Segate Barracuda that I can carry over from my old PC

The PSU I chose because of the short cable kit available from Silverstone that will make building in the 250D a lot more pleasent I think.

I chose the faster memory in case I decide to upgrade to a Carrizo APU in 2015.



 My questions are;

Is this a good build for my intended uses?

What kind of overclocking can I expect with the mITX board that is a little less than enthusiast grade? (Iv'e read that the 750K can be pushed up over 5 GHz)

Is this a good graphics card to pair with this CPU?

Will the absence of a L3 cache really hurt my gaming performance?

Thanks in advance.

It will be alright, but an Intel build would be much stronger.  The 760k is also around the performance of an i3.  2400mhz RAM isn't needed in this build as well.

I'd say around 4.5ghz, especially with that watercooler.  Remember, it all depends on your luck.  It's known as the "Silicon Lottery".  No two chips are completely alike.

Yeah, it's a good mid range card.

No, not really.

Here's an Intel build.  Intel really pulls ahead in SFF PCs:  You shouldn't need to overclock an i5 for quite awhile as it's a lot more powerful than a 760k: