It depends on what you're looking for in a dress sock.
To us, the best quality dress sock is one that feels super-soft, lasts a while, stays up on the leg, and doesn't have an annoying seam on the toe for starters. If a dress sock doesn't at least have soft premium yarn and flat seams, it's a non-starter and shows they're not paying attention to the details. Oh, and we want an arch-support because socks sliding and repositioning around our feet doesn't feel great.
Beyond that, sock style is important but it's really a personal preference if you like Merino wool socks yarn over Pima cotton socks or if you prefer mid-calf dress socks more than over-the-calf dress socks.
We prefer a mid-calf sock but it must stay in place on the calf. This is another hard stop for us, which is why we invented and patented some cool tech that we put into our dress socks called TrueStay®. All dress socks that we've produced in the last few years have the tech baked in. When it comes to our yarn preference, we like wool, bamboo, modal, lyocell, and cotton socks and we use all of them in different product programs.
There are several brands making quality dress socks well today. We think we're one of the best - if you try our socks and don't love them, we'll make it right.