I have both the A40's and the Turtle Beach Ear Force Tango's.
The Astro's are more comfortable to wear - period.
The Astro's in my opinion have better sound as well.
Or think about the TB xp 500 it´s really comfortable to wear and works great even if you have many disturbing hardware, like wlan sources. Also the batteries last quite long since the moved from AAA to AA sice.
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