So one day I was watching another StarCraft player's stream and noticed his chair and an advertisement for a DX Racer chair. I did some more research and discovered that many StarCraft players use these chairs, and they're used in professional tournaments around the world. I currently was using a generic executive chair from like Office Depot, so it made more sense that I should get a chair made specifically for gamers.
I ended up purchasing the M-Series OH/MY07/NR, because it was one of the few models that offered adjustable arm rests and the ability to lock the seat in a rocked position. I also lucked out because while I was patiently researching their chairs and deciding which one to get since I couldn't try them out in person, they changed their website and offered a 10% discount on all chairs. Since the chair runs for about $450, this saved me $45!
So far I am very happy with my purchase. The chair is very comfortable and the adjustable arm rests make it so that my arms don't feel uncomfortable when resting on the keyboard on my high desk. I will say that the only con has been that the arm rests aren't as soft as my old ones, but you can easily add padding to it if you wanted it to be softer. The adjustable arm rests can go in and out, forward and back, and up and down, so there's a lot of flexibility in finding the perfect position.
And as you can see, Duncan approves. In fact, he loves it so much that if I even get up to go to the bathroom, he'll jack my seat!