Well, you're wasting money on a sound card, the integrated audio will do just fine for those speakers. If I were you I would get a USB wireless adapter, easier to install and remove in case it fails and you can take it with you. 750W power supply is an overkill, why not get this 660W with better quality for almost the same price (http://pcpartpicker.com/part/seasonic-power-supply-ss660xp2)
P.S. By the monitor and card you got I'm guessing you're gonna do a lot of gaming (specially shooters). If that's the case I would recommend you spending a little bit more money on some good headphones. Personal recommendation: https://pcpartpicker.com/part/logitech-headphones-981000257
Thanks! I actually forgot about the sound card, and I am going to keep the psu because of the future, but thanks anyways, and the headphones seem like a good idea, so thanks.