It took me a long time to decide which one I wanted for the next couple of years. I finally decided on SE S710.
I was really leaning towards the SE Z520a after seeing good reviews and the compact size BUT the one thing that lead me away from it is the camera shutter button. Some of the reviewers mentioned it being sensitive and takes pictures without even trying. I went to a store to check it out and sure enough it took pictures of things even with a slight touch.
I like the S710 because of the larger display as well as being able to do what I wanted it to do. I like the fact it has Bluetooth and IR transfers so I was able to transfer all of my contacts using IR from my previous phone and the PDA. I've had it for a couple of days now and I found one thing that I don't care for. In order to get to a name in my contact list, I have to scroll from beginning of the first letter of the name. I can't narrow the search by typing out the name as I was able to do on the Nokia. I hope I can find my way through this with some kind of shortcut or something.

HJ