The F6 is designed primarily as a Field recorder, and at least in those circles (live sound, film/video, et al), the elimination of the integer-imposed dynamic range limit is seen as a big win, mostly to avoid having to do a retake or work-around, e.g. a slamming door that was a lot louder than expected, or whatever. (F8/F8n owner user and never ran into a dynamic range problem w/o 32-bit-float, but I don't work in film stuff...)
For home recording, I don't see a bonus, and in fact it's possibly the wrong choice if your DAW doesn't leave the file alone on import or have a 32-bit float setting when using it as an interface. It's unlikely you *need* 32-bit float dynamic range capability recording at home. (And, yes, as [MENTION=103008]bouldersoundguy[/MENTION] says, you can still overdrive the preamps, but you might be deaf at that point, or bent the ribbon...)
P.S. (edit) I tried to use my F8s as interfaces for a brief while between interfaces when I updated my computer and lost the FW port. I found it extremely unsatisfying because while it "worked" there was really no way to manage the outputs easily, e.g. for routing to a headphone amp, and you needed adapter cables for unbalanced connection to monitor speakers. I don't even know if the F6 has both main and sub outs to work with. So, I got an interface and the F8n is sitting out for tests and whatever until I feel safe enough to venture out again :|