Re: Easier, faster, much more inexpensive answer.
Research _what_, exactly? While there are things to learn about Martian geology and, through that, planet formation and the history of the early solar system, there's just nothing we need a human presence on Mars to learn that can in any way defend the ridiculous costs and risks involved in a manned mission to Mars, much less a manned station on Mars.
A Mars colony is and will remain a pipedream. Not because it will necessarily remain technologically infeasible, but because there will not exist a sensible _purpose_ for one. Any human babitation it would make sense to build on Mars would make a lot more sense to just build on Earth, in orbit of Earth or on the Moon -- and so far we haven't even found much point in building human habitatio in orbit or on the Moon besides a couple of tiny space stations that are, really, mostly for show.