I've used Noctua fans for years. I have tried the Redux ones, and they are good, but these Premium fans are worth the extra in my opinion.
For a start, you get splitter cables, anti-vibration mounts, an extension cable and a low-noise cable included in the price. The last item is really intended for builds that don't have on-board fan speed control, as it slows the fan down manually to reduce the noise.
These fans have 4-pin connections for full PWM control, so if your motherboard has suitable headers, you can control the fan speed down to zero. Be sure to order the correct ones, as Noctua make several, similar-looking fans with different connections and speeds.
I've got two of these 80mm fans drawing air into the front of my case, and a 120mm exhaust at the rear. I also have a Noctua CPU cooler inside. I'm using the Fan Xpert software for my ASUS motherboard, and my PC is utterly silent. If I really load it up (or it's a VERY hot day), the fans speed up automatically. Even with all four fans at full speed, it's not very noisy - unlike the stock ones which sounded like a hovercraft!
Obviously, the low noise means nothing if the fans don't move enough air. They do. They are excellent. The inside of my case rarely rises above the ambient temperature in the room, even though it's totally over-filled with multiple drives, has cables everywhere and has terrible airflow inside.
The colour of these fans might not be to everyone's taste, but my case has no windows, and I wouldn't be able to see inside even if it did, because it's under the desk.