This was a build I made for a friend. The budget was $600 and is used for typical daily uses and light gaming on the side.
It's one of my first builds using an AMD CPU. Since we were at a strict budget, it made more sense to go with AMD rather than intel. 8GB on ram is pretty standard, and tried to match the case as best as possible. There is not need for overclocking so we went with a lower wattage PSU with a stock heatsink.
The case was pretty light with not much features to it. I'm also a sucker for BitFenix. Two front fans were needed since it only came with 1 exhaust fan. I especially liked how you install the front fans onto the filter itself. Cable management was a bit tricky since there wasn't much room at the other side of the case but it turned out ok.
Overall I think this is a great example of a build under $600 for light to moderate gaming in terms of performance.