This PC will be mostly used for simple everyday tasks, like web browsing, video watching, burning CDs, MS Office, etc. I'm sure these things don't require a big amount of computing power, but I still want it to be fairly fast. Also, I need a SSD to store important documents that I can't risk to lose in the event of a crash.
Please feel free to correct the list or make any suggestions. Thanks in advance!
First, the build you have is a decent one, I don't see any glaring issues.
You can get a 7770 for the same price as the 7750: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
You want *backups* if there is data you can't afford to lose, not an SSD. SSDs can and do die just like hard drives; it just tends to be a controller failure and as such you get no warning. That kingston one is a decent drive though.
You can get almost the same performance as your build above for less $ if that interests you with an a10-5800k and and FM2 motherboard (using onboard graphics).