Thank you all!
I've made my mind about the fusion, but my sales-guy tries to push me into 1.5L turbo engine. He says it is only $600 more than the SE( 2.5L engine ) that I picked, and will get better gas mileage.
I've been doing some research about the 1.5 L engine, but no real life experience/experiments so far. What do you think about 1.5 L?