I was a Treo win mob user for years. Even run the BBConnect service on it for quite a while. Corporate use mostly so not much experience on media or a lot of third party apps.
Email/syncing and browsing worked as they should. I don't recall ever pulling the battery. Don't recall taking it to my admin for os upgrades either. Must have been lucky if i believe the horror posts i read about win mob handsets.
I say go for it. Give it a try and see how it performs for you. Maybe compile a little review post after you had it for a while.
BBF is blackberry-centric so one should expect that the median would skew towards BB handsets and solutions. Don't let that stop you though. Give it a try and let us know. Good luck.