I got into editing video and audio with just an ASUS notebook (U47A) that is a couple years ago. Needless to say it didn't take long for her to start getting a bit upset with me. I started to researching what it would cost to build a PC and figured I could do it for around $600. I didn't not take into account my lust for everything new and shiny. A few months later and this is where I'm at yet I seem to purchase another higher quality party every few weeks.
I am overclocking the APU using the stock Catalyst auto tuner.
The AeroCool DS is a super slick looking case. I am not one for flashy ornamentation so the DS (which is not really all that silent) was right up my alley. It doesn't have many options when it comes to expansion, but you can't get too crazy with a mATX build anyway.
I highly recommend the Lite-On slot loading ODD...no one expects a slot loading drive on a "traditional" PC. The IcyDock drive cage is pretty awesome as well...it feels very well built and even has its own dedicated fan in the cage. I have two 2.5 drives from old notebooks that I pop in from time to time.
The only thing I regret a little is going with a mATX board. I wanted the system to be compact, but now that I realize how much fun I'm having its a bit late. I've run out of room to expand.