[breadfan]

Don't really need a soundcard unless you are editing/recording audio or really really want quality surround - i.e. you are investing in good hardware that utilises it

Do check out if 1600MHz memory will actually perform at anything above 1333MHz unoverclocked on that CPU, otherwise it's redundant cost

I would definitely recommend an after market CPU cooler, the stock Intel ones are pretty terrible and especially for you since it looks like you'll be putting it through some work. Just make sure you do your research and get one that fits inside the case!