littman scope which kind or ultrascope???

i am preparing to start ns in the fall and am wanting to purchase my stethoscope. the nursing instructor at the school said she really likes the master classic, but on these boards i see ALOT of talk about the cardiology3 and the littman classic se. also, i see some people like the ultra scope, which imo are really cute, but i want to get the best stethoscope for the money and i want it to last. so i am just hoping for some input on what people think is good. thanks in advance