I've got a w810i, I've had it for coming up on a year and I still love it.
The camera's fantastic, takes excellent pictures. I love having the built in radio and I use the mp3 player alot. The headphones that come with it are outstanding, they block out everything else except your music (on that note do remember to remove at least one earpiece when crossing the road etc, even if your music is down low, seriously.)
As a phone it's pretty intuitive. I enjoy using it. My partner has the w800. There is a big difference in the quality of photos between one and the other I find. Mine takes much better pictures, autofocus is superb. The software that comes with the w810i for transferring music to the phone is far superior to the w800.
If you use bluetooth it's really quite impressive on the w810i, (and the w800 incidentally) I can bluetooth stuff to my partner when she's downstairs and I'm upstairs.
I'm due to upgrade, but I have no intentions right now because I haven't found anything that I want more than the phone I have at the moment.
The only thing I would change would be for it to possibly be a flipphone, I like my screen to be protected. It would probably make the camera not as good to use though... Second thoughts, it's perfect as is.