I got the 9900 on the first day and it was amazing. Played with it for two weeks then noticed that it was never gonna work out because the battery life was horrid. Its gorgeous and slender and fast and amazing, but why do we have to worry about battery life every day we unplug it?
I switched to the 9810 and can't be happier. Battery lasts like it should, great camera and very quick and nice big screen!