>>2Wi-fi adapter:
There's a usb version that you can find for around $15. Goes up to 15mb/s, so unless you stream on 3 channels at once while loading 15 youtube videos you'll be fine.
Keyboard:
Why the fuck would anyone spend that kind of money on a keyboard.
WHY.
You can buy a simple keyboard and mouse for $30, there's no reason to waste that much money.
Tower (I assume you meant case):
Do whatever, just be sure it has decent cooling, check for overheating issues from other customers, and if it allows you to add fans later if needed.
HD:
Fine, by all means.
Graphics card:
>650Ti
Good for a gaming rig, no real problem here, so long as it stays meant for games.
RAM:
Only 4 GB? Really?
I used to run 8GB, and came close to using up all of it after only a few months of multitasking. If you play a lot of games and browse the internet, at least get 8GB. You can always add more later as needed.
Motherboard:
Not bad at all.
CPU:
As much as I love AMD, keep an eye on that thing. Saying you have an AMD CPU is like saying your computer is a very real fire hazard. Just keep an eye on your CPU temp, and don't overdo your processor and you should be fine.
>>3Pertaining to the last part:
Absolutely not, 500 GB is more than adequate. The reason I say this is because of the way most people save on storage space:
>Buying a external hard drive
Simply save all your games, anime, pictures, and other things on the external, and save executable programs on the on-board storage. That way you can buy more storage for cheaper, you can share almost any of your files with friends, and you can transfer your files easily between your desktop and laptop (if applicable). On top of that, you can always buy and use more storage if you run out, versus if you fill an on-board HD you have to choose which ONE you want to use (unless you have multiple HD bays, which I have no idea why you would). With external drives coming so cheap, there's no reason not to. A standard 2 TB HD (external) will run just below $130, and you can last on that for at least a good 10 years, unless you download a LOT of porn or something.
Just one thing: do NOT get Seagate.
DO.
NOT.
GET.
SEAGATE.
I've had several friends who at an early point bought a seagate drive, and every one of them crashed from 2-24 months. Most other external HD producers are fine, just keep away from Seagate.
Oh, and make sure the external drive has USB 3.0 so you can take full advantage of the 3.0 ports you already have.