I tried Das, Filco and Ducky. Each has its charms.
Das Looks great from distance, but when close.. well the outer board itself is not scratch resistant at all. No matter how you want to keep your keyboard look brand as new, Das will get some scratches. But when it comes to typing experience, it's great. I would say in some aspects, peronally, better than Filco.
Also it provides with 2 USB ports, but I don't know if you "really" need them. I did use them, but didn't matter so much.
Filco is renowned for its excellent overall quality. It's expensive but great overall. It's just what you expect. Very solid. For cons.. there's really nothing much to the overall quality, but it's missing extra features like detachable cables, media functions, or any other. Military style Filco does have media functions though.
Ducky has all kinds of keyboards with different keycaps too. Some provide multimedia functions (volume control), and some has PBT keycaps on. It's just keycaps are made of PBT material which is known for longer lasting than normal ABS keycaps, and provides different typing feeling than normal ABS material keycaps (Filco uses normal ABS keycaps).
Personally, I would go with Filco or Ducky.
