I considered the top brands you mentioned like Herman Miller and Steelcase, but the affordability factor just wasn't there.
Ultimately, I landed here on the "MyoChair" by Autonomous. If you're on Facebook I bet you have seen one of their ads for a standing desk, but they make some pretty nice chairs too. This chair met all of my criteria. It's definitely budget friendly @ $139, it's damn comfortable, and I think it looks pretty stylish (I went with the cool gray color). You can spend a little extra and add on a headrest and leg rest, but I don't do much "lounging around" in my home office.