I've ordered my Steelseries 6Gv2 last week, still waiting for it to arrive. I think you have read enough material, and otherwise, go read it, there is enough out there. I was actually myself looking for reasons why people bought certain keyboards. A lot of the razor black widow users came down to that it was simply the most affordable one in any store remotely near them. For me as well, I bought the steelseries because it was the only one that was available(though still have to wait 2 weeks) and affordable, as I don't feel like spending 150 euro's on a keyboard to be honest.
I'm expecting my board any day now, if you're interesting in my experience feel free to message me or something