I've been using my Das Keyboard Professional for just under a day and I have to say, I like it. It feels much better to me than the Deck Ice Legend's Cherry MX Black switches do. I also appreciate the keyboard's smaller foot print which frees up already non-existent desk space for me. So far this is the best keyboard I've used since the IBM Model M I used to have way back in the day. I've never used any of Filco's offerings so I can't speak to their quality or compare the Das Keyboard to them. The main reason I went with Das Keyboard is because they had one at Microcenter and I was able to test it out before I bought it. I don't think anyone stocks Filco's keyboards locally to allow me to do the same. Anyway, I'm pretty happy so far.