POSITIVESNokia- Cheap, long lasting battaries, very durable, can do basic procedures
Sony Ericsson- Cheap(some), good battery life, pretty durable. great looks, very easy menus
NEGATIVESMotarola- Horrible menus, not so good battery life, expensive
Nokia- Some ugly phones, Battery Problems(exploding battery range), large for size
My opinion would be to get the Sony Ericsson Z550i, my brother has it, and his an expert at phones, go to gsmarena and look up Z550i.
-Ming