As someone who has personally tested the HD598, AD700, X1, MA900 and Q701, the PC360 are absolutely terrible, and all of these were tested with a Mixamp pro (which I love btw). I couldn't believe after using the aforementioned headphones, all of which were great in their own ways, how muddy, dark and terrible the PC360 sounded. I ended up returning all of the above except for the AD700, which I had been using for a couple years, as I simply couldn't justify the $200+ purchase when the AD700 were as good or better than they were for my main purpose, gaming.
The X1 were my favorite all-rounder and I kept them longest before returning them and if I'd gotten in on the $150 deal I would absolutely have kept them, and beyond the fit and price I got the MA900 for, I'd have also kept them and $150 is about the sweet spot for those also IMO. The Q701 yearned for a better amp than I had and wasn't willing to purchase at the time, and they were easily the least comfortable due to the bumps.
The HD598 were great for pretty much everything, a solid B all-around but not necessarily an A in anything, and those were returned in favor of the AD700 again, due to the price and because they didn't improve on the gaming prowess of the AD700.
That said, can anyone truly recommend a pair that is better for (competitive) gaming than the AD700 that aren't astronomically priced? I'm still looking for a good deal to grab another pair of X1's, but haven't tried any open beyers or AKG's other than the K/Q701's.