I found FS and RC beds to be comfortable, but not much different from the Westin Heavenly Bed.

The best hotel bed I've slept in in the US is at the Sofitel Minneapolis. It looks awful from the road, but the newly remodeled rooms, and Sofitel beds are awesome. It is the only location where I look forward to going to sleep - my colleagues all agree.

The bed is a "Sofitel Bed." They sell it like everyone else. I am assuming they have the same stuff in their other locations.