Before you spend the money, do you need to "upgrade"? Sounds like you are building another system rather than an upgrading. It also sounds like you are building a gaming system rather than something for school work or just ripping music or movies.? The fact/truth with gaming, you can never keep up with the latest games. Perhaps for a year or a little more.
The specs look pretty good but remember AMD 64 is quite finicky with the surrounding hardware. Overclocking isn't all that difficult nowadays. You don't need to flip switches like used to.
Anyway, have fun with the new PC.