Sony Ericsson S710a

Ok, so I have a S710a that I am in love with. But unfortunately, I dont like holding onto one phone for to long. ( Used to work for Cingular so I am acustomed to a new phone every 2-4 weeks ) This phone has been great, hell there is absolutley nothing wrong with it. Yet I want to upgrade to something new. Was never a big SE fan until this phone, so I am kind of out of the loop to if it was just the S710interface that was a winner, or if SE finally got there heads out of there asses after the whole T300 series phones. So if any of you can lend a hand, let me know........What is an appropriate update to this phone. 😉