What cell phone is bettter? please help! :)?

ok so i have a LG shine. im getting kinnda tired of it though. especally texting. it gets really annoying. it kinnda gives me finger cramps. so i was looking at the samsung blackjack (tm) 2. just cuz it has a full keypad and everything. so i was wondering which one is better. i dont want to miss my shine. so the blackjack has to b alot better. and then another question is can u buy a new phone b4 ur contract is up?