Hello guys

Trying to choose the best possibile headphones for under 200$ ( which I AM going to use for 5 years od more) I stopped by open back Beyerdynamic 990 ( previously also considered HiFiMan HE 400i, Philips X2, Sennheiser 650).聽

My friends advice me to choose close back for better immersion into whatever I hear in headphones. Though I prefer hearing a bit what is happening around me, and I definitely hate not hearing myself. I used to have closed headphones before and this is just not for me.聽

So my questions are:聽

1) Should I choose DT990 Pro or DT990聽 Edition? What would be the difference? DT 990 Pro seems to be more popular and has that nice retro telephone cable .聽聽

2) To experience DT990 true potential should I buy 600 ohm or 250 ohm would be better for home only use? I did not find a clear explanation about the difference. What else should I buy to power them?

3) What is the best "price/quality" DAC/AMP to have the mentioned above true potential?聽

4) The most important question is if I AM making the right decision about DT990? After watching many reviews they seemed the best possibile choice聽 due to product and sound quality/price.

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I need to order headphones and possibily the Amp tomorrow as my current headphones are falling apart and I almost do not hear anything while using them.聽

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And since there is still time to change my mind about Beyerdynamic and get something else, better for the same price I Ask you to help me with this.聽