Well I actually changed almost everything from your build, I'll list why now that I have some spare time
-One difference between AMD and intel CPUs is their cores. The intel have stronger cores but usually not so many, while the AMD usually have more cores that are weaker.
You were going to buy a 2 year old AMD cpu with only 2 cores. The intel cpu I listed came out this year and has 2 cores. I don't think the a4-3300 even is close in anything to the G3220.
-The 4gb of memory is faster than the memory you had. 1600mhz is the minimum these days. Usually when you only have integrated graphics, you want to have 2x2gb memory and something higher than 1866mhz. But, I thought you could just add in another 4gb stick later and even add in a nice $100 graphics card when you can. A graphics card is always better than the graphics of the CPU.
-It is actually more of a "trap" when you buy a tower/powersupply bundled together. It means 100% that the power supply will be bad quality. The power supply I have selected is fine for what you are doing. The tower was just a good tower, it can be changed if you want.
-I put in a 1TB hard drive for $52 and you put in a 500gb Hard drive for $49