Headset ideas

So I am looking to steer away from traditional gaming headsets and move in to the realm of headset with non-attached microphone... After watching several videos, to include the "Gaming headsets suck" series by TS, I am still somewhat lost and in need in a little direction. I have started my shopping process and these 3 headsets are the ones that I think will most benefit my budget and needs, but would like some input.

Audio Technica AUD ATHAD500X

Superlux HD668B

Samson SR850

i understand that the open form factor of the design is supposed to give you a better sense of immersion, but as far as the actual sound quality and characteristics such as frequencies and all that, I am lost. Of the three above, what would be a good starting point? I am leaning more towards the Superlux headphones, but being a sound rookie, I don't want to spend money on it without a better understanding... please help.

Thanks in advance.