Computer chair lol. You trickster you! Incidentally, I'm very interested in audio production as well as gaming too. You're saying that motherboard has a good built in sound card?
Speaking to the OP, I would suggest switching to an intel CPU; I hardly understand why people still go the AMD route. Especially in this price range. An Ivy Bridge CPU would be very appropriate. Of course, you'd have to change out the motherboard for something with an LGA slot.
'cause his usage is audio production and gaming.
Meaning you'll have to fit both those in the build without sacrificing too much on the other.
The only Ivy Bridge that can match the 8-core Piledriver in multithreaded tasks(in this case audio production) will be the i7-3770K. That cheapest of that you can find is $315 on Amazon, and even then the FX-8320 or 8350 is just right behind its performance.
As for gaming, Intel i5/i7 would win hands down since most games are single-threaded. An i5 won't be an option though since it's only a quad-core and has no hyperthreading, hence the audio production part will suffer. The FX-8320 would perform fairly well in games since most are GPU-based now and modern ones are slowly evolving to being perfectly well-threaded.