I bought a F900BT from crutchfield cause I couldn't find the F90BT ANYWHERE. Looks like I will be sending it back and getting mine from A&E 
I do like crutchfields 30 day return policy lol
I did the update on my 900bt and it fixed what others have noted. Namely the bluetooth, which was a big selling point for me.
I didn't like all the add on modules with my P6800dvd so I sold it for an f series.
I do however have a feeling that the current f series will be just like the d1. Hot shit but quickly replaced by a newer model.
But I have to have the latest and greatest technology.
On a side note, I think the F series is hackable. Reminds me of my old apex 600a dvd player, or my old DTV system, then the psp. Oh whetever, bring on the custom skins !