Detailed study of dusty red rocks is all fine and dandy, but I don't think anyone is clamoring to land a man on Mars for #ScienceGoals. The most inspiring space achievements have all been trailblazing, and visually iconic. Think of Earthrise from Apollo 8, first Man on the Moon photo from Apollo 11, the lunar rover, the Blue Marble, the Space Shuttle itself, images from Hubble, landing 2 SpaceX rocket boosters at the same time etc. The Viking landings on Mars count too as well as the first rovers, but we're far into diminishing returns territory at this point.

Given the reality of a limited budget, I'd prefer to see those resources spent towards doing something new, more challenging, and more interesting; such as landing on the moons of Jupiter and Saturn (or even a more durable modern lander/drone on Venus). Also I think there is plenty of science to be had on a geologically active moon with a significant atmosphere.