There are a few things about the samsung e900 that have put me off of it to be honest, things that are similar to all samsungs. Having had sony ericsson's for the last couple i find them the most user friendly and they best meet my needs. I would recommend you go to a few phone shops and go try a few out, its hard to make a decision without knowing what you personally like.

The K800i comes out today on O2, just about to order mine now...