What Phone Should I Get? Sony Ericsson K850i Or Sony Ericsson W760i Or...

...Something Else? I have a Black Berry Peal 8120 but im a guy thats likes to change.
This time i want a good camera phone with also a good media player.
I was either thinking of getting a Sony Ericsson K850i,Sony Ericsson W760i, Tmobile G1, or Itouch and keep the phone, or anything else with $300 range.

Thanks

i also have tmobile service
im planning to get unlocked
does anyone know if picture message works on the Sony Ericsson?
i had a k800i and MMS didnt work but Internet did