14 yrs old? cell phones?

i need help pickin out a cell phone, im trying to choose between the pantech duo or the lg walkman ibunchanubers somethin, the one with a squiggly line and then it says walkman i think. well i really want one with a keyboard but im 14 and the pantech duo looks kinda mature, do they sell teenage lookin cases for that? and can you help me choose please?