I am thinking of doing the same- in spite of my concerns about GPS accuracy being at the same level as the F3/F3HR.
I may wait a little longer for CO to list the metal band model as well.
Considering some of Garmin's other devices- including FR735XT and my current Vivoactive HR, better accuracy is clearly achievable. To me, they messed up big time at the F3 design stage with that horrible antenna.
Hopefully they will rectify that mistake with the new watches- let's see if Garmin learn from their mistakes at all..