Any advice?
Ugh... new page.
Yeah, Samsung 830 (probably 840/840 Pro too, I'd feel safe in buying one at least) and Crucial M4 are the go-to SSDs for reliability.
Your brother's upgrade looks good, but unless you are planning on eventually going with an unlocked processor on his build (like your 2600K as a hand-me-down), then go with an H77 motherboard to save some money. Throw it in a BitFenix Outlaw, Merc Alpha, Rosewill Challenger, or Diablotek Evo.
There's no point in upgrading to 16GB of RAM really. If you're dead set on it, get the Samsung 30nm RAM as it can clock to 2000/2133 no problem. It's also super low profile which is great.
The Gigabyte 670 Windforce is a silent beast. Definitely the way to go.
*edit*
Just stopped by my local computer shop and they had the ASRock FM2 ITX boards in stock. I couldn't resist. Now I just need to finalize a case and buy an A10. Can't wait to run some overclocked benches on it with the Samsung 30nm RAM. I'm hoping for good things. Comfy couch gaming in a tiny form factor could be pretty rad.