Many people prefer the i4 to the V6 in character. It is a FWD sedan with sporty intentions, but it is not designed to hang with the classic sports sedans - 3-series, IS300, G35, etc.. Still, I like the best of the bunch its designed to compete with (Accord, Camry, Altima).
Lighter is always better, but finding a sedan under 3000lbs today would be, dare I say, impossible!?!