Looking for a decent sound system

So I am in the market looking for a decent sound system for my recently build PC. I am currently using a Takstar Hi2050 (ik they are cheap, but they sound great). I am now looking for:
Closed- Back, Over-the-Ear Headphones (Neutral)
2.0 or 2.1 Speaker System
I am planning to play around with editing music, videos, and other stuff. Reason for the closed back (neutral) headphones. My On board Sound Card is just BAD, I can't drive an 80 Ohms DT990 (my dad's). My dad also gave me a Xonar U7 but it just straight up break after 2 months, the plug for headphones won't work. I am looking for the DAC/AMP (USB) for the headphones and the speaker that i am planning to get. I'll be plugging bot the speaker and Headphones on the DAC/AMP at the same time and just switch it around on Windows (10). I saw some pretty cool 2.0 multimedia speakers and they are quite good, with great bass and decent highs. I don't care about the loudness of the speakers i am more concerned on the clarity and balance. For the Mic, I will be using it for VOIP, Skype, etc. I am looking for a mic that wont pick up the sound of my surrounding (if possible). (I have a separate Mic for recordings (The Audio Technica AT2020 (gift from a great friend of mine)))

Headphones = $100
DAC/AMP (USB) = $100
2.0 or 2.1 Speaker System = $160
Mic = $60
Currently looking at:
Koss Pro4AAT (http://www.amazon.com/Koss-Pro4AAT-Titanium-Pro-Headphones/dp/B00008Z1QI/ref=sr_1_2?ie=UTF8&qid=1440638274&sr=8-2&keywords=koss+pro4aa)
Koss Pro4S (http://www.amazon.com/Koss-Pro4S-Studio-Headphones-Silver/dp/B00MCVOT48/ref=pd_sim_sbs_23_3?ie=UTF8&refRID=19AZJJY4ZPPAR2CWSCHG)
HD 280 Pro (http://www.amazon.com/Sennheiser-HD-280-PRO-Headphones/dp/B000065BPB/ref=pd_sim_sbs_23_27?ie=UTF8&refRID=0RBT7KBFPHYFMT4XSPNY)
SRH 440 (http://www.amazon.com/Shure-SRH440-Professional-Studio-Headphones/dp/B002DP1FTU/ref=pd_sim_sbs_23_22?ie=UTF8&refRID=0RBT7KBFPHYFMT4XSPNY)
MDR7506 (http://www.amazon.com/Sony-MDR7506-Professional-Diaphragm-Headphone/dp/B000AJIF4E/ref=pd_sim_sbs_23_35?ie=UTF8&refRID=05ZDV11Z6YN7TW1ES04D)
MDR7510 (http://www.amazon.com/gp/product/B004YZYR4C?psc=1&redirect=true&ref_=ox_sc_act_title_2&smid=ATVPDKIKX0DER)
HM5 (http://www.amazon.com/Brainwavz-HM5-Studio-Monitor-Headphones/dp/B006MA9XXM/ref=pd_sim_sbs_23_59?ie=UTF8&refRID=05ZDV11Z6YN7TW1ES04D)
Sabre USB DAC 2 (http://hifimediy.com/DACs/ready-made-dacs/usb-dac2) / PSU (http://hifimediy.com/PSM3plus-Power-supply-110V)
SoundBox Pro (http://www.amazon.com/Sewell-Direct-Soundbox-External-SW-30415/dp/B00K1OOGRI/ref=pd_sim_sbs_23_49?ie=UTF8&refRID=0YCBJNNWENF8JD42047T)
Omni Surround (http://www.amazon.com/Creative-Performance-Headphone-Integrated-Microphone/dp/B00EZT7RE4/ref=sr_1_sc_1?s=pc&ie=UTF8&qid=1440646924&sr=1-1-spell&keywords=omni+surroound)
M10 (http://www.newegg.com/Product/Product.aspx?Item=N82E16836140006)
CR4 (http://www.newegg.com/Product/Product.aspx?Item=9SIA1622V91832&cm_re=cr4-_-9SIA1622V91832-_-Product)
XD4 (http://www.newegg.com/Product/Product.aspx?Item=9SIA4HU1MJ3807&cm_re=xd4-_-0S6-00AA-00010-_-Product)
ModMic 4.0 (Unidirectional) (http://www.modmic.com/products/modmic-4-0)

If you got suggestions, that would be great. If not please pick the best one out of the ones I chose. Thank you!! ^~^

P.S. The cheaper, the better.