Indeed, I saw the title of this post and I wondered if the poster was looking for a setup similar to the Freestyle... and it turns out they were!
I made the switch a couple of years ago from a standard layout mechanical to the "Kinesis Freestyle Edge RGB" (nominally a gaming keyboard, but I don't use the gaming features) and would not go back. This device can't achieve quite as much separation as the "dual keyboard" approach in this blog entry, but it's not too far off.
As for the switches, in addition to the mechanical version with its various switch options, they also make a rubber dome variant of this keyboard, which happens to be cheaper.